GB/T 21541-2008Chlorinated methanes for industrial use - Determination of purity - Gas chromatography (English PDF)

1 Scope

This standard specifies the test industry with dichloromethane (CH2Cl2), chloroform (CHCl3), carbon tetrachloride (CCl4) component measured method.

This standard applies not cyclopentene as a stabilizer industrial dichloromethane (CH2Cl2), chloroform (CHCl3),

Carbon tetrachloride (CCl4) and determination of impurity content.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 9722-2006 General chemical reagent gas chromatography

3 Method summary

Under the selected chromatographic operating conditions, after chlorinated methane vaporized sample through the column, so that the various components measured want to separate from the flame

Ionization detector to calculate the corrected area normalization method, net of sample water to give chlorinated methane product purity quality scores.

4 Reagents and materials

5 Instruments

6 chromatography conditions

Recommended chromatographic columns and operating conditions are shown in Table 1. A typical chromatogram chlorinated methane and relative retention times given in Appendix A. other

You can achieve the same degree of separation columns and chromatographic operating conditions can be used.

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