CN105044296A - Method for determining m-xylene content of indoor air after decoration - Google Patents
Method for determining m-xylene content of indoor air after decoration Download PDFInfo
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- CN105044296A CN105044296A CN201510537761.5A CN201510537761A CN105044296A CN 105044296 A CN105044296 A CN 105044296A CN 201510537761 A CN201510537761 A CN 201510537761A CN 105044296 A CN105044296 A CN 105044296A
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Abstract
The invention relates to the field of detection of pollutants in indoor air and in particular relates to a method for determining the m-xylene content of indoor air after decoration. The method is characterized by collecting the indoor air with a sampling pipe, desorbing the gas with a thermal desorption instrument and determining the gas desorbed from the thermal desorption instrument with a hydrogen flame detector after the gas enters an on-line coupled gas chromatograph to be separated, wherein the desorption temperature of the thermal desorption instrument is 250 DEG C and the desorption time is 6 minutes; the gas chromatograph column flow is 1mL/min; the initial temperature of a column box is 45 DEG C; the temperature is raised to 250 DEG C according to the program after the initial temperature is maintained for 12 minutes; the temperature raising rate is 3 DEG C/min and is maintained for two minutes; the temperature of a base of the hydrogen flame detector is 250 DEG C; the flows of air, hydrogen and make-up gas are respectively 350mL/min, 35mL/min and 30mL/min. The method has strong universality, so that the method has extensive 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 m-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.
M-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 m-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 m-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 45 DEG C, and after keeping 12min, 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 m-xylene content, effectively can be separated identification with other components, thus the m-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 m-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 45 DEG C, and after keeping 12min, 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 m-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 45 DEG C, and after keeping 12min, 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.
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CN201510537761.5A CN105044296A (en) | 2015-08-28 | 2015-08-28 | Method for determining m-xylene content of indoor air after decoration |
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CN201510537761.5A CN105044296A (en) | 2015-08-28 | 2015-08-28 | Method for determining m-xylene content of indoor air after decoration |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11169124B2 (en) | 2017-11-22 | 2021-11-09 | Entech Instruments Inc. | System and method for real time monitoring of a chemical sample |
US11549921B2 (en) | 2017-11-22 | 2023-01-10 | Entech Instruments Inc. | System and method for real time monitoring of a chemical sample |
US11946912B2 (en) | 2020-06-30 | 2024-04-02 | Entech Instruments Inc. | System and method of trace-level analysis of chemical compounds |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2831117Y (en) * | 2005-09-29 | 2006-10-25 | 张天龙 | Secondary pyrolytic desorption instrument analysis detecting benzene and general volatile organic substance in air |
CN104697949A (en) * | 2013-12-05 | 2015-06-10 | 张双保 | Rapid nondestructive testing method for harmful substances in furniture |
-
2015
- 2015-08-28 CN CN201510537761.5A patent/CN105044296A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2831117Y (en) * | 2005-09-29 | 2006-10-25 | 张天龙 | Secondary pyrolytic desorption instrument analysis detecting benzene and general volatile organic substance in air |
CN104697949A (en) * | 2013-12-05 | 2015-06-10 | 张双保 | Rapid nondestructive testing method for harmful substances in furniture |
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》 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11169124B2 (en) | 2017-11-22 | 2021-11-09 | Entech Instruments Inc. | System and method for real time monitoring of a chemical sample |
US11549921B2 (en) | 2017-11-22 | 2023-01-10 | Entech Instruments Inc. | System and method for real time monitoring of a chemical sample |
US11946912B2 (en) | 2020-06-30 | 2024-04-02 | Entech Instruments Inc. | System and method of trace-level analysis of chemical compounds |
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