GB 686-1989
chemical reagent acetone (English Version)
- Standard No.
- GB 686-1989
- Language
- Chinese, English version preview
- Release Date
- 1989
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2008-11
- Replace By
- GB/T 686-2008
- Latest
- GB/T 686-2023
- Replace
- GB 686-1978
- Scope
- This standard stipulates the technical requirements, test methods, inspection rules, packaging and signs of f chemical reagent acetone. This standard applies to the inspection of the chemical reagent acetone.
- Introduction
Overview and Standard Background
Acetone (C₃H₆O) is a colorless, transparent liquid with a special odor. It is flammable and miscible with water, alcohol and a variety of organic solvents. Its density is 0.790 g/mL and its relative molecular mass is 58.08. This standard GB 686-89 was formulated with reference to the international standard ISO 6353/2-1983 and is applicable to the inspection of chemical reagent acetone.
Technical Indicator Analysis
Item Analytical purity (%) Chemical purity (%) Acetone content ≥99.5 ≥99.0 Boiling point (℃) 56 ±1 56 ±1 Evaporation residue (mg) - ≤1.0 Test method details
Determination of acetone content:Use gas chromatography (refer to GB 9722).
- Instrument: Gas chromatograph must meet the requirements of Chapter 5 of GB 9722, use thermal conductivity detector and specific stationary phase (such as Porapak Q).
- Conditions: Column temperature 130℃, vaporization chamber temperature 170℃, detector temperature 150℃.
- Analysis steps: Measure the sample and inject it into the gas chromatograph, and determine the acetone content by retention time ratio.
Determination of moisture:Refer to GB 4607-83 standard, use Karl Fischer method.
Determination of acidity:Use sodium hydroxide standard solution to titrate until pink and keep for 30 seconds, calculate the acidity (Formula 1).
Implementation Suggestions
When implementing this standard, laboratories should:
- Ensure that all instruments meet technical requirements.
- Prepare and test samples in strict accordance with operating procedures.
- Establish a complete quality control system and calibrate equipment regularly.
- Strengthen personnel training to improve test accuracy.
GB 686-1989 history
- 2023 GB/T 686-2023 chemical reagent acetone
- 2008 GB/T 686-2008 Chemical reagent.Acetone
- 1989 GB 686-1989 chemical reagent acetone
- 0000年 GB 686-1978
GB 686-1989 chemical reagent acetone was changed to GB/T 686-2008 Chemical reagent.Acetone.