GMW GMW15654-2013 Determination of Volatile and Semi-Volatile Organic Compounds from Vehicle Interior Air Issue 3 English.pdf
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1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW15654 Determination of Volatile and Semi-Volatile Organic Compounds from Vehicle Interior Air Copyright 2013 General Motors Company All Rights Reserved December 2013 Page 1 of 21 1 Scope Note: Nothing in this standard supercedes applicable laws and
2、regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. This test procedure is used for the qualitative and quantitative determination of Volatile Organic Compound (VOC) and Semi-Volatile Organic Compound (SVOC)
3、emissions in vehicle interior air utilizing Tenax TA adsorbent media and Thermal Desorption - Gas Chromatography/Mass Selective Detection (TD-GC/MSD). 1.1.1 Individual VOC and SVOC emissions in different vehicle interior air samples can be identified, quantified, and compared. 1.1.2 In combination w
4、ith GMW15634 the sources of VOCs and SVOCs in vehicle air can be identified. 1.1.3 VOC emissions are in the boiling point range 345 C or chromatographic elution range from n-pentane (n-C5) to n-eicosane (n-C20), and SVOC emissions are in the boiling range 280 C or chromatographic elution range from
5、n-hexadecane (n-C16) to n-dotriacontane (n-C32). This procedure can determine all of these components in vehicle interior air. 1.2 Foreword. The determination of VOCs and SVOCs in vehicle interior air is essential to meet customer and regulatory requirements in global markets. Concentrations are in
6、the micrograms per cubic meter (g/m3) range which warrants accurate analytical measurements. Note: There is no direct correlation between the limits on material, component and vehicle level due to the high complexity of chemical interactions, unpredictable influence of different part sizes and addit
7、ion, interaction and elimination of their emissions. 1.3 Applicability. This test procedure can be used for all air samples for the determination of VOC and SVOC emissions including cabin air inside vehicles in a stationary or dynamic mode. The results will provide complementary information to inter
8、pret findings in GMW3205, GMW3059 and GMW15634. The test procedure can be used to pursue customer complaints regarding odor. The analytical instrumentation described herein is also applicable for GMW15634 to determine the sources of VOCs and SVOCs in interior materials. 1.3.1 This test procedure was
9、 modified from EPA TO-17. 1.3.2 This test procedure complements GMW15600. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. EPA TO-17 ISO 12219-1 JASO Z125 MOLIT 2013-549 HJ/T400 2.2 GM Standards/Specifications. GM
10、W3059 GMW15600 GMW15634 GMW16818 GMW3205 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15654 Copyright 2013 General Motors Company All
11、Rights Reserved December 2013 Page 2 of 21 3 Resources 3.1 Facilities. The air samples shall be collected inside a vehicle in a garage or in a stable environment with low background levels. If data is acquired for regulatory purposes, the use of a vehicle sampling chamber is required. The test chamb
12、er requirements and sampling protocol may differ for different government regulations. 3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a valid calibration label. 3.1.2 Alternatives. Alternative test facilities and equipment may also be used. However
13、, all measuring variables as specified in this standard shall be determined correctly with respect to their physical definition. 3.2 Equipment. This test procedure utilizes commonly available equipment and instrumentation. Equivalent instrumentation and test conditions are suggested in Appendix A, T
14、able A1. 3.2.1 Balance with a sensitivity of 0.01 mg. 3.2.2 Directly Coupled Thermodesorption Gas Chromatography System with Trapping and Split System. 3.2.3 Gas Chromatograph (GC) with mass-selective detector, software and mass spectra libraries. 3.2.4 Gas Chromatograph Capillary Columns. GC Capill
15、ary Guard Column is used to prevent thermal shock to increase capillary column longevity. A low-Bleed Gas Chromatograph/Mass Spectrometer (GC/MS) Capillary Column, Stationary Phase: 5% phenyl - methylpolysiloxane is used (e.g., 50 m 0.52 mm 0.32 m Ultra 2 capillary column). 3.2.5 Tenax TA or equival
16、ent, Glass Thermal Desorption Tubes (GTDT). Compatible with the specific corresponding thermal desorption system. (See Appendix H, Figure H1.). 3.2.6 Tube-Spiking Adapter for loading liquid standards onto Tenax TA tubes and evaporating the solvent. See Appendix H, Figure H2 for details. Other tube-s
17、piking apparatus can be used. 3.2.7 Carrier Gas. Grade 5.0 Helium and a corresponding in-line purifier trap is used for the GC carrier gas, the Tenax TA Glass Thermal Desorption Tubes conditioning purge gas, and the Tube-Spiking Adapter gas. 3.2.8 Conditioning Tenax TA Glass Thermal Desorption Tubes
18、. Tenax TA tubes must be conditioned thermally with an apparatus designed for that purpose. Set the helium or nitrogen purge gas flow rate to 30 mL/minute to 40 mL/minute for each port. Conditioning consists of heating Tenax TA GTDTs at 320 C continuously for 3 h 10 minutes. After thermal conditioni
19、ng, the sorbent tubes should be packed airtight in aluminum foil or protective end caps to prevent contamination. 3.2.9 Syringes for Spiking Tubes. Ten (10) L, 5 L, and 1 L syringes. 3.2.10 Solvents for Standard Dilutions. Methanol (MeOH), High Pressure Liquid Chromatography (HPLC) grade Dichloromet
20、hane (MeCl2), HPLC grade 3.2.11 Standards and Dilutions. All standards and dilutions are to be kept in sealed containers and refrigerated at 8 C when not in use. 3.2.11.1 Standards of desired VOC and SVOC components at 98% purity (or equivalent). 3.2.11.2 Check standard containing a mixture of 18 in
21、dividual components, 110 G/mL 10 g/mL each in MeOH. (See Appendix B, Section B1.) 3.2.11.3 Calibration standard consisting of toluene, 500 g/mL 50 g/mL in MeOH. See Appendix B, Section B2. 3.2.11.4 Retention Time Lock Standard. The n-Alkane Standard containing n-C5 to n-C32 of 28 individual n-Alkane
22、 components, 2000 g/mL each in MeCl2. 3.2.11.5 Aromatic Performance Standard. Aromatic Standard containing aromatic hydrocarbons, e.g., 14 individual components, 2000 g/mL each in MeOH. 3.2.11.6 Grob-Test Mix for testing the GC column performance. 3.2.12 Sampling Pump. Portable sampling pumps with a
23、 flow calibrator and a minimum flow range between 50 mL/minute to 1000 mL/minute and an appropriate flow calibrator (e.g., type DC-1 flow calibrator BIOS International No. DC-MC-1). Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproductio
24、n or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15654 Copyright 2013 General Motors Company All Rights Reserved December 2013 Page 3 of 21 3.3 Test Vehicle/Test Piece. The vehicle to be tested is determined by the test director. The actual age of the vehi
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