GB/T 31401-2015Fluorinated alkane—Determination of chloride (Cl—)—Turbidimetry (English PDF)

1 Scope

This standard specifies the determination fluorinated alkanes chloride (Cl-) general method --- turbidity method.

This standard applies to the determination of chloride in fluorinated alkanes. This test method detection sensitivity is chloride (Cl-) volume fraction

0.0003%.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 6680-2003 General rules for sampling liquid chemical products

GB/T 6681-2003 General rules for sampling gaseous chemical products

Laboratory use specifications and test methods GB/T 6682 Analysis

3 Sampling

4 principle of the method

Under acidic conditions, the fluoroalkane chloride (of Cl-) in methanol saturated with silver nitrate solution produced by the reaction of silver chloride precipitate. Visually

Precipitate as silver chloride was not observed by the test.

5 Test methods

Warning. some of the test procedure specified in this standard can lead to dangerous situations, the user should take appropriate safety and health protection measures.

Test methods and reagents used in water in the absence of other specified requirements, refer confirmed analytically pure reagents and GB/T 6682 stipulated

Three water.