GB/T 34237-2017 in English
VALIDFluorinated olefins for refrigerant use--General method for the determination of water
- Issued on:2017-09-07
- Implemented on:2018-04-01
- File Format:PDF
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《GB/T 34237-2017制冷剂用氟代烯烃 水分测定通用方法》由TC63（全国化学标准化技术委员会）归口，TC63SC9（全国化学标准化技术委员会制冷剂分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
GB/T 34237—2017 Interpretation of the General Method for Determination of Moisture in Fluorinated Olefins for Refrigerants
This standard specifies in detail the method for determining trace moisture in fluoroolefins for refrigerants, including Karl Fischer Coulometric Coulometric Method and Electrolytic Method. It is applicable to fluoroolefin samples under various pressure conditions to ensure product quality and performance.
1. Background of Standard Formulation
With the increase in environmental protection requirements, the refrigerant industry has increasingly stringent quality requirements for fluoroolefins. Moisture is a key factor affecting its stability and efficiency. This standard provides a scientific basis for ensuring that products meet international quality standards.
2. Comparison of standard frameworks
| Project | Karl Fischer coulometric method | Electrolytic method |
|---|---|---|
| Scope of application | Medium-pressure and high-pressure fluoroolefin liquid samples | Low-pressure fluoroolefin gas samples |
| Principle | Measurement of moisture content by electrolytic reaction, accurate to 0.0001% | Determination of moisture content by gas flow and electrolytic cell reaction |
| Instrument requirements | Coulometric moisture meter, sample injector, electronic balance | Trace moisture meter, electrolytic cell system |
3. Implementation suggestions
Case study: Application in a fluorine chemical enterprise
- Use Karl Fischer method to detect high-pressure fluoroolefins to ensure that the moisture content is less than 0.001%
- For low-pressure samples, use electrolysis for rapid determination
- Establish quality control procedures and calibrate instruments and equipment regularly
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