Some standard content:
ICS 71. 040. 30
HG/T2892—1997
Registration No. 428--1997
This standard provides two levels: analytically pure and chemically pure. The analytically pure non-equivalent adopts R872-propanol in ISO6353-3:1987 "Chemical Analysis Reagents Part 3: Specifications Batch 2", the difference is as follows. 1 Standard Name
According to my country's national conditions, the name of this standard is set as "isopropyl alcohol", and the corresponding English name is "Isopropyl alcohol". 2 Standard preparation
According to my country's national conditions, this standard adds three chapters: properties, inspection rules, packaging and marking. 3 Specifications
This standard has three more analytical purity items than the international standard: water mixing test, easily carbonized substances and potassium permanganate reducing substances. The water content is lower than the international standard, and the other items are the same as the international standard. 4 Test
All the determination methods in this standard refer to the corresponding standards in a set of general test methods for chemical reagents that have been formulated in my country. This set of standards is basically formulated using ISO6353-1:1982 "Chemical Analysis Reagents Part 1: General Test Methods". This standard was established on the basis of HG/T 3-11671978 "Chemical Reagent Isopropyl Alcohol" standard was formulated. Compared with the original standard, the three items of boiling point, alkalinity, aldehydes and ketones were cancelled, and the four items of density, methanol, carbonyl compounds and iron were added. Corresponding changes were made in specifications and test methods to adopt international standards.
This standard will replace HG/T3-1167-1978 from the date of entry into force. This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Beijing Chemical Reagent General Factory. This standard is drafted by Tianjin Chemical Reagent Factory No. 2. The main drafter of this standard is Yan Xiaoyan.
Chemical Industry Standard of the People's Republic of China
Chemical Reagent
Isopropyl Alcohol
Chemical reagent--Isopropyl alcohol Indicative formula: (CHs), CHOH
Relative molecular weight: 60.10
1Fanpuwww.bzxz.net
HG/T 2892- 1997
This standard specifies the technical requirements, test methods, inspection rules, packaging and marking of the chemical reagent isopropyl alcohol. 2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 601-1988
GB/T 602—1988
GB/T 603—1988
GB/T 606-1988
GB/T 611—1988
GB/T 619-1988
GB/T 6682—1992
GB/T 9722—1988
GB/T 9726-
GB/T 9733—1988
Chemical reagents-Preparation of standard solutions for titration analysis (volumetric analysis)Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Preparation of standard solutions for determination of impurities
Preparation of preparations and products used in test methodsGeneral method for determination of water (Karl Fischer method) (eqvISO6353-1:1982)General method for determination of density (eqvISO6353-1:1982)Sampling and acceptance regulations
Specifications and test methods for water for analytical laboratories (eqvISO3696:1987)Chemical reagents
Chemical reagents
Chemical reagents
GB/T 9736--1988
GB/T 9737--1988
GB/T 9739-1988
GB/T 9740--1988
GB 15346—1994
3 Properties
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
General rules for gas chromatography
General rule for determination of substances reducing potassium permanganate (eqvISO6353-1:1982)General method for determination of carbonyl compounds (eqvISO6353-1:1982)General method for determination of acidity and alkalinity (eqvISO6353-1:1982)General rule for determination of easily charred substances (eqvISO6353-1:1982)General method for determination of iron (eqvISO6353-1:1982)General method for determination of evaporation residue (eqvISO6353-1:1982) Packaging and marking
This reagent is a colorless and transparent liquid. It has a slight ethanol odor and is miscible with water, alcohol, and ether. It is flammable. 4 Specifications
Approved by the Ministry of Chemical Industry of the People's Republic of China on April 21, 1997, and implemented on January 1, 1998
Content ((CH,)CHOHJ, %
Density (20℃), g/mL
Evaporation residue, %
Mixing test with water
Acidity (in terms of H+), mnol/100 g
Substances that reduce potassium permanganate
Easily carbonized substances
Carbonyl compounds (in terms of CO), %
Methanol (CH,OH), %
Iron (Fe), %
Water (H,O), %
5 Tests
HG/T 2892- 1997
0. 784 ~~0. 786
Unless otherwise specified in this chapter, the standard titration solutions, standard solutions, preparations and products used shall be prepared in accordance with the provisions of GB/T601-1988, GB/T602-1988 and GB/T603-1988. The water used in the experiment shall comply with the third-grade water specifications in GB/T6682--1992, and the samples shall be measured accurately to 0.1mL.
5.1 Content
Determine in accordance with the provisions of GB/T9722--1988, including: 5.1.1 Determination conditions
Detector: flame ionization detector;
Carrier gas and flow rate: nitrogen, 4.3cm/s;
Column length (stainless steel column): 3m;
Column inner diameter: 3mm;
Stationary phase: 2/3 of 10% polyethylene glycol 2000 and 1/3 of 10% dioctyl sebacate coated on 101 white diatomaceous earth carrier [0.18mm~0.25mm (60 mesh~80 mesh)], aged at 110℃ for more than 4h, column temperature: 70℃;
Vaporization chamber temperature: 150℃;
Detection chamber temperature: 150℃,
Injection volume: 0.2μL;
Effective plate height of chromatographic column: Het<2.0mm;
Asymmetry factor: f≤1.2,
Resolution of difficult-to-separate pairs of substances: R≥1.5 (ethanol and isopropanol), relative retention value of components relative to the main body: rmethanol, isopropanol=0. 7; r ethanol, isopropyl alcohol = 0. 81; r n-carnitol, isopropyl alcohol = 1. 9. 5.1.2 Quantitative method
HG/T 2892-
—1997
Determine according to 8.2 of GB/T9722—1988. 5.2 Density
Determine according to 5.1 of GB/T611--1988. 5.3 Evaporation residue
Measure 127mL (100g) of chemically pure sample and 63.5mL (50g)) and determine according to GB/T9740-1988 (retain the residue for determination of iron).
5.4 Mixing test with water
Measure 10mL (7.8g) of sample, add 30mL of water and mix well. The solution should be clear. 5.5 Acidity
Determine according to 6.1 of GB/T9736-1988. Wherein: Measure 100mL of carbon dioxide-free water, add 2 drops of bromothymol blue indicator solution (1g/L), neutralize with sodium hydroxide standard titration solution [c(NaOH) = 0.02mol/L, when reaching the end point, the solution is blue, keep it for 30s. Add 20mL (15.7g) sample, shake the hook, if the solution is yellow, titrate with sodium hydroxide standard titration solution [c(NaOH) = 0.02mol/L7 until the solution is blue, and keep it for 30s. The result is calculated according to Chapter 7 "Water-soluble Samples" of GB/T9736-1988. 5.6 Reducing potassium permanganate substances
According to 6.1 Determination as specified. Wherein: Measure 10mL (7.8g) of sample, place in a colorimetric tube, adjust the temperature to 15℃, add 0.5mL potassium permanganate standard solution Lc (1/5KMnO) = 0.1mol/L), shake, cover the colorimetric tube, and place at 15℃ for 15 min. The pink color of the solution shall not disappear. : 5.7 Carbonizable substances
Determine according to GB/T97371988. Wherein: Measure 5mL of sulfuric acid, place in a dry colorimetric tube, cool to 10℃, and add 5mL (3.9g) of sample drop by drop (the solution temperature shall not be higher than 20℃ at this time). The color of the solution shall not be darker than the following standard color: Analytical pure
Chemical pure
5.8 Carbonyl compound
..R/4.
Measure 0.5mL (0.4g) sample and measure according to GB/T9733---1988. The dark red color of the solution shall not be darker than the standard comparison solution. The preparation of the standard comparison solution is to take the following amount of carbonyl compound standard solution: Analytical pure
Process it at the same time as the sample.
5.9 Methanol
Same as 5.1.
Chemical pure
...0. 02 mg CO;
........04mgco.
Add 1mL of hydrochloric acid solution (20%) and a small amount of water to the residue (5.3) after the evaporation residue is determined, dissolve it, dilute it to 15mL, adjust the pH value of the solution to 2 with ammonia solution (10%), and then determine it according to the provisions of GB/T9739-1988. The red color of the solution shall not be deeper than that of the standard comparison solution.
The standard comparison solution is a standard solution containing 0.01 mg of iron (Fe), diluted to 15mL, and the pH value of the solution is adjusted to 2 with hydrochloric acid solution (10%), and the adjusted test solution is treated in the same way at the same time. 5.11 Water content
Determine it according to the provisions of GB/T606-1988. Among them: measure 5mL (3.9g) of sample and use 10mL of methanol as solvent. 6 Inspection rules
Sampling and acceptance shall be carried out according to the provisions of GB/T619-1988. 1203
Packaging and marking
HG/T 2892 --- 1997
Packaging, storage and transportation shall be carried out in accordance with GB15346-1994, and marking shall be given, including: Packaging unit: Class 4 and 5;
Inner packaging form: NB-20.NBY-20, NB-21.NBY-21, NB-26NBY-26, NB-27, NBY-27, NB-29.NBY-29, isolation material: GC-2, GC-3
Outer packaging form: WB-1.
The label should indicate "flammable items".
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