Method for simultaneous detection of various volatile organic compounds in marking pen

Abstract

The invention relates to the field of analysis and detection, and in particular, relates to a method for simultaneous detection of various volatile organic compounds in a marking pen. The method usesskimmed cotton for sampling, is easy and feasible to operate, avoids the disadvantage condition that a part of marking pen samples cannot directly obtain ink from ink bags; a matrix balance solution with high boiling point is added into a headspace bottle, large time difference remains between the balance solution and an analysis target, and the method cannot affect chromatographic analysis whileplaying a role in stabilizing gas and liquid balance; a sample introduction port temperature is set as 120 DEG C, the transmission line temperature is 110-120 DEG C, complete gas introduction can avoid interference substances from being introduced to a gas chromatography-mass spectrometry system, and prolonging of the maintenance period of a chromatographic column and a mass spectrometry end and the service life of consumables is facilitated, so the cost of detection work is reduced. The mass spectrometer can effectively separate and identify the volatile components in the samples well and therequirements of quantitative detection are met.

Description

technical field [0001] The invention relates to the field of analysis and detection, in particular to a method for simultaneously detecting multiple volatile organic compounds in marker pens. Background technique [0002] Domestic: QB / T 21027 "General Requirements for the Safety of Student Supplies", HJ 572-2010 "Environmental Labeling Products Stationery", QB / T 2777-2015 "Markers" and other marker-related standards require the use of markers from all aspects Safety and product quality are constrained, but the requirements for inks lack specific requirements. There is no suitable relevant test method to measure the type and content of volatile organic compounds in the marker pen ink. The internal standard method for methanol, benzene series and halogenated hydrocarbon content is adopted, but the practice of actual inspection shows that such The detection method of this method has the following deficiencies: 1. Gas chromatography detection lacks the qualitative means of the ...

AI Technical Summary

Problems solved by technology

[0002] Domestic: QB / T 21027 "General Requirements for the Safety of Student Supplies", HJ 572-2010 "Environmental Labeling Products Stationery", QB / T 2777-2015 "Markers" and other marker-related standards require the use of markers from all aspects Safety and product quality are constrained, but the requirements for the ink are lack of specific requirements

There is no suitable relevant test method to measure the type and content of volatile organic compounds in the marker pen ink. The internal standard method for methanol, benzene series and halogenated hydrocarbon content is adopted, but the practice of actual inspection shows that such The detection method of this method has the following deficiencies: 1. Gas chromatography detection lacks the qualitative means of the target beyond the retention time, which often causes false positives or false positive test results; Compounds also need to be separated by a relatively long time and low column temperature program during the test, and there is a possibility of combined detection; 3. The liquid sampling after the paint is diluted and dissolved will cause more non-volatile substances to remain at the injection port. These substances It will cause adsorption to subsequent samples, which will lead to poor repeatability of sample detection; 4. The classification and detection methods stipulated in the standard greatly reduce the efficiency of detection work and increase the complexity of operation while taking into account the accuracy of detection. At the same time, it is accompanied by a large amount of experimental reagent consumption, which does not conform to the development trend of environmental protection and energy saving

Images