GB/T 19649-2005 Determination of 405 pesticide residues in cereals by gas chromatography-mass spectrometry and liquid chromatography-tandem mass spectrometry
Some standard content:
ICS 67.060
National Standard of the People's Republic of China
GB/T 19649-2005
Method for determination of 405 pesticides residues in grains-GC-MS and LC-MS-MS method
Issued on 2005-02-04
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implemented on 2005-08-01
GB/T19649—2005
Appendix A, Appendix B, Appendix C, Appendix D, Appendix E, Appendix F, Appendix G and Appendix H of this standard are informative. This standard was proposed by the Qinhuangdao Inspection and Quarantine Bureau of the People's Republic of China. This standard is under the jurisdiction of Hebei Exit-Entry Inspection and Quarantine Bureau of the People's Republic of China. The drafting unit of this standard is Qinhuangdao Exit-Entry Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard are Pang Longguofang, Liu Yongqi, Fan Chunlin, Zhang Jinjie, Cao Yanzhong, Duo Xuemin, Wu Yanping, Guo Tongtong. This standard is the first national standard issued
Multiple residues of 405 pesticides in grains
Gas chromatography-mass spectrometry and liquid chromatography-tandem mass spectrometry GB/T 196492005
This standard specifies the determination method of 405 pesticide residues (see Appendix A) in grains by gas chromatography-mass spectrometry and liquid chromatography-tandem mass spectrometry.
This standard is applicable to the determination of 405 pesticide residues in grains such as rice, millet, black rice, corn, barley, wheat, and oats. The method detection limit of this standard is 0.0002mg/kg-0.3000mg/kg (see Appendix 4). 2 Normative references
The clauses in the following documents are cited in this standard and are considered as the clauses recommended by this standard. For dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest versions are applicable to this standard. GB54911985 Grain and oilseed inspection sampling and splitting method GB/T 6379 Precision of test method Repeatability and reproducibility of standard test method determined by inter-laboratory test (GB/T 6379-1986, neg ISO 5725:1981) GB/T 6682 Specification and test method for water for analytical laboratories (GB/T 6682-1992, neq ISO 3696:1987) 3 Principle
The sample is extracted with acetonitrile by accelerated solvent extraction instrument. After the extract is purified by solid phase extraction column, the pesticide is eluted with acetonitrile + toluene (3+1). According to different test requirements, it is tested by gas chromatography-mass spectrometer and liquid chromatography-tandem mass spectrometer. 4 Reagents and materials
Unless otherwise specified, water is the first-grade water specified in GB/T 6682. 4.1 Acetonitrile: chromatographic grade.
4.2 Diatomaceous earth: high-grade pure,
4.3 Anhydrous sodium sulfate: analytical grade. Burn 4 tons at 650℃ before use, store in a desiccator, cool and set aside. 4.4 Toluene: high-grade pure,
4.5 Propylene: analytical grade, redistilled.
4.6 Chloromethane: chromatographic grade.
4.7 Methanol: chromatographic grade.
4.8 Envi-18 column. 12 ml., 2 g or equivalent. 4.9 Sep-Pak Alumina N column: 12 ml, 2 g or equivalent. 4.10 Fnvi-arb column\6mL, 0.5g or equivalent Sep-Pak NH column 3 mL. 0.5 g or equivalent 4.119
1) Envi-J8 column Fnvi-Carb is the trade name of a product provided by StPFI.C. This information is given for the convenience of the users of this standard and does not represent an endorsement of the product. If other products can have similar effects, these equivalent products can be used. 2) Sej-Pak Alurina N and Scp-Pak NH columns: are the trade names of products provided by Waters. This information is given for the convenience of the users of this standard and does not represent an endorsement of the product. If other products can have similar effects, these equivalent products can be used. GB/T 19649—2005
4.12 Pesticide standard material: purity 295%. 4.13 Pesticide standard solution
4.13.1 Standard stock solution
Accurately weigh 5mg-~10mg (accurate to 0.1mg) of each pesticide standard substance in a 10ml volumetric flask. Dissolve in toluene, toluene-1-acetone mixture, dichloromethane, methanol and other solvents according to the solubility of the standard substance and the needs of the determination and make up to the volume (see Appendix A for solvent selection).
4.13.2 Mixed standard solution (mixed standard solutions A, B, CD and E) According to the nature and retention time of the pesticides, the 405 pesticides are divided into five groups, A, B, CD, and E, and the concentration in the mixed standard solution is determined according to the response sensitivity of each pesticide on the instrument. For the grouping of the 405 pesticides in this standard and the concentration of their mixed standard solutions, refer to Appendix A.
According to the group number of each pesticide, the concentration of the mixed standard solution and the concentration of its standard stock solution, a certain amount of the single pesticide standard stock solution (4.13.1) is transferred to a 100 ml volumetric flask, and the pesticides in groups A, R, C, and D are diluted to the mark with methyl alcohol, and the pesticides in group E are diluted to the mark with methanol. The mixed standard solution is stored at 4°C and can be used for one month. 4.13.3 Internal standard solution
Accurately weigh 3.5 mg of heptachlor epoxide in 100 ml. Put it in a volumetric flask and make up to the mark with methanol. 4.13.4 Matrix mixed standard working solution
The matrix mixed standard working solution of pesticides in groups A, B, C, and D is prepared by adding 40 μL of internal standard solution (4.13.3) and a certain volume of mixed standard solution to 1. (mL of sample blank matrix extract, mixing them evenly to prepare matrix mixed standard working solutions A, B, C, and D. The matrix mixed standard working solution of pesticides in group E is prepared by using sample blank solution to prepare matrix mixed standard solution E of different concentrations, which is used to make standard working curve. The matrix mixed standard working solution should be prepared before use. 5 Instruments
5.1 Gas chromatograph-mass spectrometer: equipped with electron ejection source (EI). 5.2 Liquid phase chromatograph-tandem mass spectrometer: equipped with electrospray ion source (ES1). 5.3 Analytical balance: 0.1 mg and 0.01 g each. 5.4 Accelerated solvent extractor: equipped with 34 ml. Extraction cell. 5.5 Rotary evaporation.
5.6 Nitrogen blow dryer.
5.7 Pear-shaped bottle: 200mL.
5.8 Pipette: 1ml.
5.9 Pulverizer.
6 Sample preparation and preservation
6.1 Sample preparation
Grain samples collected according to GB5491 are crushed by a pulverizer, passed through a 20-mesh sieve, mixed, sealed, and used as samples. Label the sample. 6.2 Sample Storage
The sample was stored at room temperature.
7 Determination Steps
7.1 Extraction
Weigh 10g sample (accurate to 0.01g) and mix with 10g diatomaceous earth, transfer into the 34ml extraction cell f of the accelerated solvent extractor, heat for 5min at 10.34MPa pressure and 80℃, extract statically for 3min, repeat twice, and then use 60% ethyl acetate in the cell volume. 19649—2005
(20,4mL) rinse the extraction pool, start ammonia suction for 100s, after the extraction is completed, mix the extracted liquid, for samples with lower oil content, take half of the volume of the extract (equivalent to 5 sample amounts), for samples with higher oil content, take one quarter of the volume of the extract (equivalent to 2.3g sample amount), wait for purification,
7.2 Purification
7.2. 1 For pesticides in groups A, R, t, 1): Place Fmvi.18 on a fixed rack and pre-wash the column with 10 ml of acetonitrile before adding the sample, connect the pear-shaped bottle below, move it into the above extraction column, and elute with 15 ml of acetonitrile, concentrate the eluted wave to about 1 ml on a rotary evaporator, and set aside. 7.2.2 For Group F pesticides: Concentrate the extract to about 1 ml on a rotary evaporator. Place the Sep-Pak Alunina N column in a fixed rack with a pear-shaped bottle below. Use 20 ml of 1% ethanol before adding the sample.z Pre-wash the column, transfer the sample concentrate to the purification column, and then wash the sample bottle with 3×10ml acetonitrile, and transfer the washing solution to the sample, and shrink the elution to about 11I on a rotary evaporator for later use. 7.2.3 Add about 2 cm high anhydrous sodium sulfate to the Envi-Carh column, connect the rod to the top of the Sep-Pak NH. column, and put the series column into the fixed rack 1 connected to the pear-shaped bottle below. Before adding the sample, pre-wash the column with 4ml. ethyl + toluene (3 + 1). When the liquid level reaches the top of the sodium sulfate, quickly transfer the sample concentrate to the purification column, and then wash the sample bottle with 3×2ml. acetonitrile + benzene (3 + 1), and transfer the washing solution to the column. Add a 50 inL reservoir to the Shenlian column, and use 25 mL acetonitrile + toluene (3-1) was used to elute the pesticide, which was collected in a T-shaped bottle and concentrated to about 0.5 mL in a 40°C water bath. For A, B, and CD pesticides, 2×5 mL of n-hexane was added for solvent exchange twice, and the final sample volume was about 1 ml. 40 μl of internal standard solution was added, mixed, and used for gas chromatography-mass spectrometry determination. For E red pesticide, the concentrated solution was placed on a nitrogen blow dryer to dry, and then acetonitrile + water (3+2) was quickly used to make the volume 1 mL, mixed, and used for liquid chromatography-tandem mass spectrometry determination. 7.3 Determination
7.3.1 Gas chromatography-mass spectrometry
7. 3. 1. 1 Conditions
Chromatographic column: DB-1701 (30m×9.25mm×0.25μm) quartz capillary column or equivalent: a)
Chromatographic condensation: 40% for 1 min, then increase the temperature to 130℃ at 30℃/min, and then increase the temperature to b)
250℃ at 5℃/min. Then increase the temperature to 300℃ at 10℃/min. Maintain for 5 min; Carrier gas: nitrogen. Purity 99.999%. Flow rate is 1.2 ml./mine
Sample outlet temperature: 290℃:
Injection volume: 1mL;
Injection method: No split injection: 1.5 Open the diverter valve and septum purge valve after 10 minutes: g) Electron bombardment source: 70eV;
h) Ion source temperature: 230℃
i) GC-MS interface temperature: 280℃;
i) Select ion monitoring: Select 1 quantitative ion and 2 to 3 qualitative ions for each compound. All ions to be detected in each group are detected in the order of emission and in different time periods. For the retention time, qualitative ion, qualitative ion and the ratio of the abundance of quantitative ion to qualitative ion of each compound, please refer to Appendix B. The start of each group of detected ions For time and residence time, see Appendix C. 7.3.1.2 Qualitative determination
When performing sample determination, if the retention time of the detected Xenogold peak is consistent with that of the standard sample, and the selected ions are present in the sample mass spectrum after background subtraction, and the selected ion abundance ratio is consistent with the ion abundance ratio of the standard sample, it can be determined that the sample contains this pesticide compound. If it cannot be confirmed, the sample should be re-injected and confirmed by scanning mode (with sufficient sensitivity) or by adding other confirming ions or by using other more sensitive analyzers. 7.3.1.3 Quantitative determination
This method uses the internal standard method to perform quantitative determination. The internal standard is heptachlor epoxide. In order to reduce the influence of the matrix, the quantitative standard should be a matrix-mixed standard working solution. The concentration of the standard solution should be close to the concentration of the compound to be tested. The AB, C, L) four paper standard substances of this method are selected ion monitoring GC-MS diagrams in grain matrix. See Appendix T). 7.3.2 Liquid chromatography-tandem mass spectrometry
7.3.2.1 Conditions
GB/T 19649—2005
Chromatographic column: AtlantigTMdC1, 3μm, 150mmX2.1mm or equivalent, a)
Mobile phase and flow rate see Table"
Column temperature: 40;
Injection volume: 20L:
Scanning mode: positive ion scanning,
Detection mode, multiple reaction monitoring;
Electrospray voltage: 5500V
Nebulizer gas pressure: 0.076MPa
Curtain gas pressure: 0.083MPa1
Auxiliary gas flow rate: 6 L/min;
Ion source temperature: 350℃;
For monitoring ion pairs, collision energy and declustering voltage, please refer to Appendix E. Table 1 Mobile phase and flow rate
Time/min
7.3.2.2 Qualitative determination
Flow rate/(μL/min)
Water/(%)
Ethyl ether/(%)
The sample solution is determined according to the liquid chromatography-tandem mass spectrometry conditions. When the sample is determined, if the retention time of the detected chromatographic ions is consistent with that of a certain pesticide in the matrix standard, and the abundance ratio of the two selected ion pairs is consistent, it can be determined that the sample contains this pesticide residue.
7.3.2.3 Quantitative determination
In this method, the liquid chromatography-tandem mass spectrometry adopts the external standard calibration curve method for quantitative determination. In order to reduce the influence of the matrix on the quantitative determination, a series of tea mass standard working solutions used should be prepared with blank sample solution, and the matrix standard working solutions should be injected to draw the standard curve and ensure that the response values of the pesticides in the measured samples are within the linear range of the instrument. The total ion flow chart of 43 pesticide standard substances determined by liquid chromatography-tandem mass spectrometry is shown in Appendix F.
7.4 Parallel test
Perform the test on each sample according to the above steps. 7.5 Blank test
Perform the above steps except that the sample is not weighed. 8 Calculation of results
8.1 The results of gas chromatography-mass spectrometry can be automatically calculated by a computer according to the internal standard method, or calculated according to formula (1): A×4×××
Wherein,
X.---the amount of the analyte residue in the sample, in milligrams per kilogram (mg/kg); A--the peak area of the analyte in the sample solution: ()
A--the peak area of the analyte in the matrix mixed standard working solution; A
--the peak area of the internal standard in the matrix mixed standard working solution; A:--the peak area of the internal standard in the sample solution; C:--the concentration of the analyte in the matrix mixed standard working solution, in milligrams per liter (mg/L); Ci--the concentration of the internal standard in the matrix mixed standard working solution, in milligrams per liter (mg/L); m: the mass of the internal standard added to the sample solution, in micrograms (ug); m: the mass of the sample represented by the sample solution, in grams (g). GB/T19649—2005
8.2 Liquid chromatography-tandem mass spectrometry is quantitatively determined by the standard curve method. The quantitative results of the standard curve method are calculated according to formula (2): V1000
x=c*1000
X----The residual amount of the measured component in the sample, in milligrams per dry gram (mg/kg): c-the concentration of the measured component solution obtained from the standard curve, in micrograms per milliliter (μg/mL); V-the volume of the sample solution, in milliliters (mL); m-the plasmolysis of the sample represented by the sample solution, in grams (g). 9 Precision
The precision data of this standard is determined in accordance with the provisions of GB/T6379. The values of repeatability and reproducibility are calculated at a confidence level of 95%. The precision data of this standard method can be found in Appendix G. GB/T 19649—2005
Appendix A
(Informative Appendix)
405 kinds of pesticides Chinese and English names, method detection limits, grouping, solvent selection and mixed standard solution concentrations Table 405 kinds of pesticides Chinese and English names, method detection limits, grouping, solvent selection and mixed standard solution concentrations. See Table A.1 Table A, 1405 kinds of pesticides Chinese and English names, method detection limits,Table of groups, solvent selection and concentration of mixed standard solution No.
Chinese name
Heptachlor epoxide
Diacetamiprid
Dipropamyl chloramine
Thiophanate-methyl
Fluorophos
Momine
Cyclofonate
Diphenylamine
Ethyl butyl fluorine
Phorate
Methyl chlorate
Pentaminonitrobenzene
Deethyl chloramine Lazin
Isochlor
Diazinon
Fonofos
Ethiophos
Simazine
Micaotong
Dioclofos
Propylenesulfonate
Zi Kejiao
Aldrin
Dimethosulfate
Pifophos
Promethazine
Cyclonejin
Vinclorac
English name
Heptachlor-epoxide
Allidochlor
Dichinrmid
Etridiuzol
Chlormephos
Prophani
Cycloate
Diphe nylamine
Ethalfluralin
Phorate
Thiometon
Quintozene
Atrazine-desethy!
Clunazone
Diazinon| |tt||Fonnfos
Etrinfos
Simazine
Propetnnphos
Secbutmeton
Dichlefenthin
Fronemide
Mexacarb ate
Aldrin
Diniurarmine
Roinel
Promettyne
Cyprazine
Vinclozolin
Check out/
(mg/kg)
0, 025 0
0,012 5
Toluene+acetone(8+2)
Toluene+acetone(9+1)
0, Q5C 0
10. 012 5
Phenylbenzene acetone (9+1)
Shanghai standard yati liquid
Concentration/(mg/L)
Chinese name
-BHC
Methionine
Thin dead cricket
Methyl parathion
BHC
Malathion
Methion
Para-ammoniaphos
Pendimethalin
Lirongpeng
Miscellaneous ether
Ethyl bromothion| |tt||Quinthiabendium
Trans-chlordane
Daoshisan
Mebifenamide
Zeziwei
Prothiocarb
Chexidine
Fenamiphos
Chlorsulfuron
Cetirizine
Fenamiphos
Chlorsulfuron
Cetirizine
Ethiopyralid
Mist attractant
Fluoramide
Table A.1 (continued)
English name
Beta HCH
Metalaxyl
Chlorpyrifos (-ethyl)
Methyl-parathion
Anthraquinone
Delta-HCH
Fenthion
Malathion
Fenitrothion
Para oxonrethyl
Friadimefon
Parathion
Pendimethalin
Chlorbenside
Bromophos-ethyl
Quinalphos
trans-Chlordane
Phenthuate
Mprazachlar
Fenothiccarb
Prothiophos
Chlorfurenol
Dieldrin
Procymidone
Met hidathion
Napropamide
Oxadiazone
Fenamiphas
Tetrasul
Aranile
Bupirimate
Carboxin
Flutolanil
Detection limit!
(mg/kg)
0,012 5
0,012 5
0, 025 0
GB/T19649—2005
Mixed standard liquid
Clarity/《mg/L）
Dichloromethane
Toluene+acetone (9+1)
Toluene·acetone 5+1)）
...........Li............n.
Dichloromethane
GB/T19649—2005| |tt||Chinese name
ip.p'-dididi
ethion
Carbofuran
ethiconazole-1
ethiconazole-2
chlorbacillus
fensoyl
fensoyl
biphenyl
minamilin
wheat inducer
flufenacil
methoxychlor||tt| |Ciloxan
Permethrin
Banticonazole
Fluorophane
Pyridazinphos
Methionine
Triclosan
Oxycarb
Cis-permethrin
Trans-permethrin
Pyraclofos
Cypermethrin
Cypermethrin
Cypermethrin
Cypermethrin
Cypermethrin
Cynanth ...
Chloramphenicol
Triaminomethylpyridine
A.1 (continued)
English name
4,4-DDD
Ethion
Sulprofos
Etaconazole-1
Etaconazole-2
Myelobutanil
Diclofop methyl
Fropiconazole
Fensulfothin
Bifenthrin
Benodanil
Nuarimel
Methoxyehlor
Dadixyl
Tetrame thirn
Tebuconazole
Norflurazun
Pyridaphenthian
Phosmet
Tetradifon
Oxycarboxin
cis-Permethrin
trane- Permethrin | | tt | 025 0
0,025 0
0, 025 0
0, 025 0
0,012 5
n-hexane
toluene+acetone (91)
......
benzene+acetone (9+1)
toluene+acetone (9+1)
mixed standard solution
concentration/mg/L)
.........
.......
Sumeilin
Dimomin
Chinese name
Tetraaminenitrobenzene
Kanggenlin
Enter the air
Extinguishing monument
Gu-oatmealwww.bzxz.net
Trans-oatmeal
Qiluoling
Aniline α-Octane
Te" peeping
Te Le Tong
Ciprofluralin
Promethazine
Piao Kuai Tang
Te Xia Jin
Lu Gu Long
Sang Wu Qing
Methyl chlorpyrifos
Dichlorvinphos
Dimethochlor
Mefenacet
Methyl pyrifos
Te Xia Jing
Prothiotopo
Trichlorofon
Table A. (Continued)
English Name
Mevinphos
Chlotoneb|| tt||Tecnazene
Heptanophos
Hexachlorobenzeae
Ethoprpphos
cis-Dialtate
Prapachlor
tran s-Diallare
Tnifluralin
Chlorpropham
Sulfotep
Sulfalate
Alpha-HCH
Terbufos
Terbum eton
Profluralin
Diaxathion
Propazine
Chlorbufam
icloran
Terhuthylazine
Monolin uron
Flufenoxuron
Cyanophos
Chlarpyrifos-methy!
[Desmetryn
imethachlor
Alachlor
Piriniphos-nethyl
Terbi.ryn
Thiobencarb
Dicofal
Detection limit/
(mg/kg)
B/T19649--2005
Mixed standard solution
Concentration:(m/L)
Toluene-acetone (9+1)
Toluene + acetone (8+2)
GB/T 19649-—2005
Chinese name
Isopropyl metolachlor
Chlordane oxide
Methoprene
Bromophos
Ethoxychlorpyrifos
Isopropylamine
Endosulfan I
Formula-nitrogen
Methylquaternary chlorsulfonamide
pp'-DiDi
Butachlor
Ethiochlor
Badudie
Iodothiophos
Anshou
Chlorbromophos
Two bromophos
Chlorchlorpyrifos
,p-DiDi
Isopropylamine
Hexachlor
Mite-killing vinegar|| tt||o,p'-Didifei
Paclobutrazol
Gaicaojin
Propyl chlorfenapyr
Metolachlar
Oxy-chlotdane
Methoprene
Bromofos
Ethofumesete
Isopropalin
EndosulfanI
Propanil||tt| |Isofenphos
Crufomate
Chlorfenvinphos
cig.Chlordane
Tolylfluanide
1,4'-DDE
:Hutachior||tt| |Chlozalinate
Crotoxyphos
Todofenphos
Tetrachlorvinphos
Chlorbromuron
Prufenafons
Fluorochl oridcne
2+4'-DDD
Endrin
Hexaronazle
Chlotfenson
2,4-DDT
Paclobutrazol
Methoprotryne
Chloropropylate
Flamptop-methyl
Nitrofen
Oxyfluorfen
Chlnrthiphos
Detection limit/
(mng/kg)
0, 025 0
0, 075 0
Toluene-+acetone(9+1)
.............
Mixed standard solution
Concentration/(mg/L)(continued)
English name
Mevinphos
Chlotoneb
Tecnazene
Heptanophos
Hexachlorobenzeae
Ethoprpphos
cis- Dialtate
Prapachlor
trans-Diallare
Tnifluralin
Chlorpropham
Sulfotep
Sulfalate
Alpha-HCH||t t||Terbufos
Terbumeton
Profluralin
Diaxathion
Propazine
Chlorbufam
icloran
Terhuthylazine|| tt||Monolinuron
Flufenoxuron
Cyanophos
Chlarpyrifos-methy!
[Desmetryn
imethachlor
Alachlor
Piriniphos-nethyl
Terbi.ryn
Thiobencarb
Dicofal
Detection limit/
(mg/kg)
B/T19649--2005
Mixed standard solution
Concentration:(m/L)
Toluene-acetone (9+1)
Toluene + acetone (8+2)
GB/T 19649-—2005
Chinese name
Isopropyl metolachlor
Chlordane oxide
Methoprene
Bromophos
Ethoxychlorpyrifos
Isopropylamine
Endosulfan I
Formula-nitrogen
Methylquaternary chlorsulfonamide
pp'-DiDi
Butachlor
Ethiochlor
Badudie
Iodothiophos
Anshou
Chlorbromophos
Two bromophos
Chlorchlorpyrifos
,p-DiDi
Isopropylamine
Hexachlor
Mite-killing vinegar|| tt||o,p'-Didifei
Paclobutrazol
Gaicaojin
Propyl chlorfenapyr
Metolachlar
Oxy-chlotdane
Methoprene
Bromofos
Ethofumesete
Isopropalin
EndosulfanI
Propanil||tt| |Isofenphos
Crufomate
Chlorfenvinphos
cig.Chlordane
Tolylfluanide
1,4'-DDE
:Hutachior||tt| |Chlozalinate
Crotoxyphos
Todofenphos
Tetrachlorvinphos
Chlorbromuron
Prufenafons
Fluorochl oridcne
2+4'-DDD
Endrin
Hexaronazle
Chlotfenson
2,4-DDT
Paclobutrazol
Methoprotryne
Chloropropylate
Flamptop-methyl
Nitrofen
Oxyfluorfen
Chlnrthiphos
Detection limit/
(mng/kg)
0, 025 0
0, 075 0
Toluene-+acetone(9+1)
.............
Mixed standard solution
Concentration/(mg/L)(continued)
English name
Mevinphos
Chlotoneb
Tecnazene
Heptanophos
Hexachlorobenzeae
Ethoprpphos
cis- Dialtate
Prapachlor
trans-Diallare
Tnifluralin
Chlorpropham
Sulfotep
Sulfalate
Alpha-HCH||t t||Terbufos
Terbumeton
Profluralin
Diaxathion
Propazine
Chlorbufam
icloran
Terhuthylazine|| tt||Monolinuron
Flufenoxuron
Cyanophos
Chlarpyrifos-methy!
[Desmetryn
imethachlor
Alachlor
Piriniphos-nethyl
Terbi.ryn
Thiobencarb
Dicofal
Detection limit/
(mg/kg)
B/T19649--2005
Mixed standard solution
Concentration:(m/L)
Toluene-acetone (9+1)
Toluene + acetone (8+2)
GB/T 19649-—2005
Chinese name
Isopropyl metolachlor
Chlordane oxide
Methoprene
Bromophos
Ethoxychlorpyrifos
Isopropylamine
Endosulfan I
Formula-nitrogen
Methylquaternary chlorsulfonamide
pp'-DiDi
Butachlor
Ethiochlor
Badudie
Iodothiophos
Anshou
Chlorbromophos
Two bromophos
Chlorchlorpyrifos
,p-DiDi
Isopropylamine
Hexachlor
Mite-killing vinegar|| tt||o,p'-Didifei
Paclobutrazol
Gaicaojin
Propyl chlorfenapyr
Metolachlar
Oxy-chlotdane
Methoprene
Bromofos
Ethofumesete
Isopropalin
EndosulfanI
Propanil||tt| |Isofenphos
Crufomate
Chlorfenvinphos
cig.Chlordane
Tolylfruanide
1,4'-DDE
:Hutachior||tt| |Chlozalinate
Crotoxyphos
Todofenphos
Tetrachlorvinphos
Chlorbromuron
Prufenafons
Fluorochl oridcne
2+4'-DDD
Endrin
Hexaronazle
Chlotfenson
2,4-DDT
Paclobutrazol
Methoprotryne
Chloropropylate
Flamptop-methyl
Nitrofen
Oxyfluorfen
Chlnrthiphos
Detection limit/
(mng/kg)
0, 025 0
0, 075 0
Toluene-+acetone(9+1)
.............
Mixed standard solution
Concentration/(mg/L)075 0
Toluene-+acetone (9+1)
.............
Mixed standard solution
Concentration/(mg/L)075 0
Toluene-+acetone (9+1)
.............
Mixed standard solution
Concentration/(mg/L)
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