CN105092736A - Method of testing p-xylene content in decoration indoor air - Google Patents
Method of testing p-xylene content in decoration indoor air Download PDFInfo
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- CN105092736A CN105092736A CN201510537677.3A CN201510537677A CN105092736A CN 105092736 A CN105092736 A CN 105092736A CN 201510537677 A CN201510537677 A CN 201510537677A CN 105092736 A CN105092736 A CN 105092736A
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Abstract
The invention relates to the field of indoor air pollutant detection, in particular to a method of testing p-xylene content in decoration indoor air. Indoor air is collected through a sampling pipe; gas is desorbed through a thermal desorption instrument; gas desorbed from the thermal desorption instrument enters an online combination gas chromatograph to be separated, and is tested through a hydrogen flame detector; the desorption temperature of the thermal desorption instrument is 250 DEG C, and the desorption time is 6 minutes; the column flow of the gas chromatograph is 1 mL/min, the starting temperature of a column box is 50 DEG C, the temperature is raised to 250 DEG C in a programmable way after the temperature is kept for 10 minutes, and the temperature raising rate is 3 DEG C/min and a raised temperature is kept for 2 minutes; the base temperature of the hydrogen flame detector is 250 DEG C, and the air, hydrogen and make-up gas flows are 350 mL/min, 35 mL/min and 30 mL/min respectively. The method has high generality, so that the method has wide applicability and practical significance.
Description
Technical field
The present invention relates to indoor air pollutants detection field, be specially a kind of assay method fitting up room air P-xylene content.
Background technology
In recent years, along with the raising of people's living standard, indoor decorating and refurnishing materials consumption significantly increases, Determination of TVOC in Indoor Air concentration also increases, the incidence of disease such as " harmful building syndrome " and " sick Building related allergies asthma " is increased year by year, the harm caused is on the rise, and in pulpit, TVOC level also seems more urgent.The relevant criterion of current country to indoor coating has GB18582-2008 " in indoor decorating and refurnishing materials interior wall coating limits of harmful substances ", HJ2537-2014 " environmental labelling product technical requirement water paint " and GB24410-2009 " indoor decorating use woodwork coating " etc., it is more than limits of harmful substances standard, the harmful substance contents of main test material self, is different from building material and discharges aerial amount of pollutant (being mainly TVOC).TVOC is the major pollutants of room air, owing to being soluble in grease, is easy to be detrimental to health by pulmonary absorption.When its mass concentration is lower than 0.2mg/m
3time, human body has no adverse reaction, and exceedes this value, may cause discomfort, even occurs headache or the injury of other nerves.
P-xylene, as one of pollutant TVOC principal ingredient, in interior decoration process at home, is usually main pollution products, therefore carries out indoor assay effectively accurately to it, will be of value to and eliminating accurately, and safeguard the health of people.
Summary of the invention
The object of the invention is to now provide a kind of assay method fitting up room air P-xylene content, adopt the equipment such as thermal desorptioner and gas chromatograph to measure, step of the present invention is comparatively simple, measurement result accurate and effective, is suitable for promoting.
For realizing the object of the invention, the technical scheme of employing is:
A kind of assay method fitting up room air P-xylene content, room air is gathered by sampling pipe, gas carries out desorb by pyrolysis analyzer, the gas separating sucking-off from pyrolysis analyzer enter on-line coupling enter be separated in gas chromatograph after measure with hydrogen flame detector, it is characterized in that: pyrolysis analyzer desorption temperature is 250 DEG C, desorption time is 6min; Gas chromatograph post flow is 1mL/min, and post case initial temperature is 50 DEG C, and after keeping 10min, temperature programme is to 250 DEG C, and heating rate is 3 DEG C/min, keeps 2min; Hydrogen flame detector base-plate temp is 250 DEG C, and air, hydrogen, make-up gas flow are respectively 350mL/min, 35mL/min, 30mL/min.
The present invention adopts pyrolysis analyzer, gas chromatograph, hydrogen flame determination method, measures fitment process and Indoor Air after Decoration P-xylene content, effectively can be separated identification with other components, thus the P-xylene content in Accurate Measurement air.Highly versatile of the present invention, therefore has applicability and realistic meaning widely.
Embodiment
Be described in further detail below by specific embodiment.
A kind of assay method fitting up room air P-xylene content, room air is gathered by sampling pipe, gas carries out desorb by pyrolysis analyzer, the gas separating sucking-off from pyrolysis analyzer enter on-line coupling enter be separated in gas chromatograph after measure with hydrogen flame detector, it is characterized in that: pyrolysis analyzer desorption temperature is 250 DEG C, desorption time is 6min; Gas chromatograph post flow is 1mL/min, and post case initial temperature is 50 DEG C, and after keeping 10min, temperature programme is to 250 DEG C, and heating rate is 3 DEG C/min, keeps 2min; Hydrogen flame detector base-plate temp is 250 DEG C, and air, hydrogen, make-up gas flow are respectively 350mL/min, 35mL/min, 30mL/min.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. fit up the assay method of room air P-xylene content for one kind, room air is gathered by sampling pipe, gas carries out desorb by pyrolysis analyzer, the gas separating sucking-off from pyrolysis analyzer enter on-line coupling enter be separated in gas chromatograph after measure with hydrogen flame detector, it is characterized in that: pyrolysis analyzer desorption temperature is 250 DEG C, desorption time is 6min; Gas chromatograph post flow is 1mL/min, and post case initial temperature is 50 DEG C, and after keeping 10min, temperature programme is to 250 DEG C, and heating rate is 3 DEG C/min, keeps 2min; Hydrogen flame detector base-plate temp is 250 DEG C, and air, hydrogen, make-up gas flow are respectively 350mL/min, 35mL/min, 30mL/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510537677.3A CN105092736A (en) | 2015-08-28 | 2015-08-28 | Method of testing p-xylene content in decoration indoor air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510537677.3A CN105092736A (en) | 2015-08-28 | 2015-08-28 | Method of testing p-xylene content in decoration indoor air |
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| CN105092736A true CN105092736A (en) | 2015-11-25 |
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| CN201510537677.3A Pending CN105092736A (en) | 2015-08-28 | 2015-08-28 | Method of testing p-xylene content in decoration indoor air |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590381A (en) * | 2012-02-10 | 2012-07-18 | 河北中烟工业有限责任公司 | Detecting method for content of benzene and benzene series in main stream smoke of cigarette |
| CN104597158A (en) * | 2015-01-20 | 2015-05-06 | 江苏新风环保科技有限公司 | Method for determining content of low-concentration volatile benzene series in indoor air and purifying material for low-concentration volatile benzene series |
-
2015
- 2015-08-28 CN CN201510537677.3A patent/CN105092736A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590381A (en) * | 2012-02-10 | 2012-07-18 | 河北中烟工业有限责任公司 | Detecting method for content of benzene and benzene series in main stream smoke of cigarette |
| CN104597158A (en) * | 2015-01-20 | 2015-05-06 | 江苏新风环保科技有限公司 | Method for determining content of low-concentration volatile benzene series in indoor air and purifying material for low-concentration volatile benzene series |
Non-Patent Citations (2)
| Title |
|---|
| NOUREDDINE YASSAA ET AL.: "Analysis of volatile organic compounds in the ambient air of Algiers by gas chromatography with a β-cyclodextrin capillary column", 《JOURNAL OF CHROMATOGRAPHY A》 * |
| 熊开生 等: "热解吸气相色谱法测定室内环境空气中TVOC含量", 《首届中国中西部地区色谱学术交流会暨仪器展览会论文集》 * |
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Application publication date: 20151125 |