This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of chlorine-containing disinfectants for fishery. This standard applies to chlorine-containing disinfectants used in aquaculture. SC 1059-2002 Chlorine-containing disinfectants for fishery SC1059-2002 Standard download decompression password: www.bzxz.net

ICS65.150
Aquatic Industry Standard of the People's Republic of China
SC1059—2002
Chlorinated Disinfectant for Fishing
Fishery chlorinated disinfectant2002-12-30 Issued
Implementation on 2003-03-01
Issued by the Ministry of Agriculture of the People's Republic of China
Aquatic Industry Standard of the People's Republic of China
Chlorinated Disinfectant for Fishing
SC10592002
Published by China Standards Press
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Book number: 1550662-1538
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Subject 635--532
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This standard absorbs relevant scientific research results and production experience at home and abroad. This standard was proposed by the Agricultural Industry Bureau of the Ministry of Agriculture.
This standard is under the jurisdiction of the Marine Aquaculture Sub-Technical Committee of the National Technical Committee for Aquatic Products Standardization, SC1059-2002
The drafters of this standard are: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Yuxiaan Aquatic Pharmaceutical Co., Ltd., Rushan Veterinary Drug Co., Ltd.,
The main drafters of this standard are: Li Jian, Liu Qi, Wang Qun, Sun Xiutao, Liu Yun, Sui Liangyue. 1 Scope
Chlorine-containing disinfectants for fishery
SC 1059—2002
This standard specifies the technical requirements, test methods, inspection rules and markings, packaging, transportation and storage of chlorine-containing disinfectants for fishery. This standard applies to chlorine-containing disinfectants used in aquaculture. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all references with a definite date, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all references without a definite date. The latest version is applicable to this standard, GB190 Dangerous Goods Packaging Mark
GB/T601 Preparation of standard solution for chemical reagent titration analysis (volumetric analysis) GB/T603 Preparation of preparations and products used in chemical reagent test method GB/T6682 Specifications and test methods for water in analytical laboratories GB/T106661995 Calcium hypochlorite (bleaching powder) 3 Technical requirements
3.1 Sensory indicators
Solid chlorine-containing disinfectants for fisheries should be in uniform powder, granular, powder or flake form, with uniform color, free of lumps and impurities; liquid chlorine-containing disinfectants for fisheries should not have obvious precipitation and suspended matter. 3.2 Physical and chemical indicators
Physical and chemical indicators should meet the requirements of Table 1
Table 1 Physical and chemical indicators of chlorine-containing disinfectants for fisheries
Available chlorine (m)
Weight loss of dry coal (solid element)
Stability test Chlorine loss (%)
Metal (in terms of Pb/m/kg)
4 Test method
4.1 Basic requirements
High-combination chlorine disinfectant
Medium-high oxygen disinfectant Medium-low oxygen disinfectant 31-40
Low chlorine disinfectant
10 ~-20
When there are no other requirements in the specification, the reagents used are analytical pure reagents: the experimental water should be derived from the third-grade water specified in GB/T6682. The preparation of the standard solution and preparation used in the test shall be in accordance with the provisions of GB/T601.CB/T603. 4.2 Sensory test
Evaluate the sensory index by visual inspection
SC 1059—2002
4. 3 Test method for effective chlorine
4.3.1 Principle
In an acidic aqueous medium, oxygen-containing disinfectant produces free chlorine, which reacts with potassium iodide to precipitate iodine. Starch is used as an indicator and titrated with sodium thiomercaptoate standard solution. The disappearance of the blue color is the peak. 4.3.2 Instruments and equipment
·General laboratory instruments.
4.3.3 Reagents and solutions
4.3.3.1 Potassium iodide solution (100g/L): weigh 100 potassium iodide and dissolve it in 1000mL of water. 4.3.3.2 Sulfuric acid solution (3+100): measure 30ml of sulfuric acid and slowly inject it into 1000rmL of water, cool and stir. 4.3.3.3 Standard sodium thiosulfate titration solution: c(N=S.0.) 0.1mol/1 4.3.3.4 Soluble starch solution: 10g/1. 4.3.4 Analysis steps
4.3.4.1 Preparation of sample
Weigh an appropriate amount of sample (containing about 1.0g of available chlorine). Accurate to 0.0002. Dissolve in water and transfer all to a 500ml volumetric flask, dilute to the scale with water and shake well.
4.3.4.2 Determination
Aspirate 25mL of sample liquid and place it in a dry iodine volumetric flask. Add 1ml of potassium iodide solution and 10ml of sulfuric acid solution. Add water to seal the flask. Place it in a dark place for a while. Then titrate with sodium thiosulfate standard titration solution until it turns light yellow. Add 1ml of starch indicator and the solution turns blue. Continue titrating until the blue color disappears. This is the end point.
4.3.5 Expression of analysis results
The calculation of the effective chlorine content is carried out according to formula (1). =V×0. 035 15×100
Wherein:
1——effective chlorine content, head;
r.—concentration of sodium thiosulfate standard titration solution, unit is mole per liter (mol/L); V-amount of sodium thiosulfate standard titration solution used during titration, unit is milliliter (ml); m-+-mass of sample, unit is gram (g); 0.03515—mass of chlorine expressed in grams equivalent to 1.00ml sodium thiosulfate standard titration solution [c (NaS.(),) 1.000 mol/1,
4.3.6 Allowable difference
Two parallel samples should be taken for each sample for determination, and the arithmetic mean value is the result. The relative deviation is allowed to be 3%. 4.4 Drying loss test method
4.4.1 Principle
The total amount of material lost by direct drying of the sample at 10°C-2°C: 4.4.2 Instruments and equipment
General laboratory instruments and equipment,
4.4.3 Analysis steps
Take a clean and dry glass weighing bottle, place it in a 105°C ± 2°C drying oven and dry it for 1.0h, take it out and cool it in a desiccator for 0.5h, weigh it: weigh about 5% of the sample into the weighing bottle, accurate to 0.0001g: the sample thickness should not exceed 511m, weigh it accurately, and place it in a 10F2°C drying oven and dry it for 2.0h. Take it out and cool it in a desiccator for 0.5h, weigh it. 4.4.4 Calculation of results
The calculation of drying loss is carried out according to formula (2).
Where:
Dry weight: %;
m means 100
The mass of the weighing bottle and the sample, in grams (g): The mass of the weighing bottle and the sample after drying, in (g); m: —-The mass of the measuring bottle, in (g). 4.4.5 Allowable difference
SC 1059-2002
Two parallel samples should be taken for each sample for determination, and the arithmetic mean value shall be the result. The relative deviation is allowed to be 4%. 4.5 Stability test The determination of effective chlorine loss shall be carried out in accordance with the provisions of 4.1 of GB/T1066G-1995. 4.6 Test method for heavy metal content (in Ph) 4.6.1 Principle
Heavy metal ions and negative divalent sulfide ions generate colored sulfide precipitation in acetic acid medium. When the content of heavy metal elements is low, a stable dark suspension is formed, and the content of jade metal is determined by daylight colorimetry. 4.6.2
Instruments and equipment
General laboratory instruments.
4.6.3 Reagents and solutions
4.6.3.1
4.6.3.2
4.6.3.3
Prepare,
4.6.3.4
Hydrochloric acid.
Acetic acid solution (1+2): Measure 50 ml of acetic acid and add to 100 ml.Mix the saturated sulfide solution in water: Pass hydrogen sulfide gas into water without carbon dioxide until saturated: Prepare the lead standard stock solution [c(Pb)=0.1mg/mL] before using this solution: Accurately weigh 1.60g lead nitrate. Dissolve it with 10 nL of caustic soda solution (1-9). Transfer it to a 1000ml volumetric flask and dilute to the mark. 4.6.3.5 Lead standard solution [c(Pb)=0.005mg/mL]: Transfer 5.00mL of lead standard solution (4.6.3.4). Place it in a 10uml volumetric flask, dilute it with water to the mark, and add a spoon. Prepare this solution before use. 4.6.4 Analysis steps
Weigh 1.008-0.01g sample, add 2nL hydrochloric acid, boil on electric stove until almost dry, cool to room temperature and transfer to 50mL colorimetric tube, transfer 10.00mL lead standard solution to another colorimetric tube. Add 0.2mL acetic acid solution, dilute to 25ml with water, add 10 mL of newly prepared saturated sodium bicarbonate aqueous solution is mixed evenly, and then placed for 10 minutes. The color presented is compared with the standard: 5 Inspection rules
5.1 Inspection classification
The products are divided into factory inspection and type inspection. 5.1.1 Factory inspection
The sensory indicators, effective oxygen content and drying loss specified in the standard are inspected. 5.1.2 Type inspection
All items specified in the standard are inspected. Type inspection should be carried out in the following circumstances: When a new product is put into production:
When there are major changes in materials, formulas, and processes that may affect product performance; - When normal production is stopped, inspection is carried out periodically or after accumulating a certain amount of output (at least twice a year): When resuming production after 99 days of suspension:
When there is a significant difference between the factory inspection and the last type inspection: SC1059—2002
When the national quality supervision and inspection agency proposes the requirement for type inspection. 5.2 Sampling
5.2.1 Batch
Products produced in one shift in a production enterprise are considered as inspection batches. 5.2.2 Sampling methodbZxz.net
Random sampling of products to be inspected shall be conducted according to batch numbers. The number of sampling boxes (pieces) of each batch of products shall not be less than 1%, and the number of sampling boxes (pieces) shall not be less than 3 boxes (pieces). From each box (piece), no less than 3 bags (bottles) of samples shall be taken, and the total number of sampling bags (bottles) shall not be less than 9 bags (bottles); for products with different manufacturing dates and batch numbers: the number of sampling boxes (pieces) shall not be less than 2%, and the number of sampling boxes (pieces) shall not be less than 5 boxes (pieces). From each box (piece), no less than 3 bags (bottles) of samples shall be taken, and the total number of sampling bags shall not be less than 15 bags (bottles). The solid samples extracted shall be reduced to an appropriate amount by the quartering method. For liquid samples, mix them in glass or plastic containers and take an appropriate amount. Divide them into three portions, one for testing and two for storage and inspection. The samples for inspection should be stored in a dense, opaque glass or plastic container in a cool, dry place. The shelf life of the samples for inspection is 1 month. 5.3 Judgment rules
The rounded value comparison method is used to determine whether the test results meet the standards. If the test results do not meet the requirements of this standard, a new sample should be taken from the original sample for re-inspection. The re-inspection results are used as the basis. If they are still unqualified, the product is judged to be unqualified. 6 Marking, packaging, transportation, purchase and storage
6.1 Marking
The packaging of chlorine-containing disinfectants for fishery products should have the manufacturer's information! Name, factory address, product name, implemented standards, product approval number, active ingredients, effective nitrogen content, specifications, production date (batch number), net content, shelf life (validity period) and other signs, and a firm "oxidant" sign as specified in (GB190).
6.2 Packaging
The packaging of chlorine-containing disinfectants for fishery should be corrosion-resistant, sealed, and strictly prevent leakage. The packaging should be accompanied by product instructions to explain the main performance of the product, quick use methods and safety precautions. 6.3 Transportation
Chlorine-containing disinfectants for fishery should be protected from sunlight and noise during transportation. They should not be transported together with organic matter, acids and reducing agents. 6.4 Purchase and storage
Chlorine-containing disinfectants for fishery should be stored in dry, cool and ventilated warehouses to prevent sunlight exposure and should not be shipped together with organic matter, acids and reducing agents. The shelf life of chlorine-containing disinfectants for fishery should not be less than 12 months under the specified storage conditions. Copyright is exclusive and all rights reserved.
Book number: 255066·215038
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SC1059-2002
Province 635-532
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