GB/T 41764-2022Determination of photoinitiator content in radiation curable coatings—Gas chromatographic-mass spectrometric method (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted.

1 Scope

This document specifies a method for the determination of photoinitiator content in radiation-cured coatings by gas chromatography-mass spectrometry.

This document is applicable to the determination of volatile photoinitiator content in radiation-cured coatings and related materials, as well as radiation-cured coatings Determination of residual volatile photoinitiator content.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 1727-2021 General preparation method of paint film

GB/T 3186 Sampling of raw materials for paints, varnishes and paints and varnishes

GB/T 12806-2011 Laboratory glass instrument single-line volumetric flask

GB/T 20777 Inspection and preparation of paint and varnish samples

3 Terms and Definitions

The following terms and definitions apply to this document.

4 Principles

Using butyl acetate and other solvents as the extraction solvent, the photoinitiators in the test samples were extracted by ultrasonic. After the extract was quantified, it was analyzed by gas chromatography-mass spectrometry.

Spectrometry was used for detection and external standard method for quantification.

5 Reagents and Materials

Unless otherwise specified, only reagents confirmed to be analytically pure and above are used in the analysis.

5.1 Butyl acetate. of analytical or known purity, does not contain any substances that interfere with the test. Alternatively, a proven recovery equivalent can be selected.

Take a solvent, such as acetone, ethanol, ethyl acetate, acetonitrile, n-hexane, cyclohexane, etc.

5.2 Photoinitiator calibration compound. purity >=98% (mass fraction) or known purity, list of commonly used photoinitiators for radiation curing coatings