HJ/T 400-2007 PDF English
US$145.00 · In stock · Download in 9 secondsHJ/T 400-2007: Determination of volatile organic compounds and carbonyl compounds in cabin vehicles Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| HJ/T 400-2007 | English | 145 |
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Determination of volatile organic compounds and carbonyl compounds in cabin vehicles
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HJ/T 400-2007: Determination of volatile organic compounds and carbonyl compounds in cabin vehicles
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/HJT400-2007
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
Determination of Volatile Organic Compounds
and Carbonyl Compounds in Cabin of Vehicles
Issued on. DECEMBER 7, 2007
Implemented on. MARCH 1, 2008
Issued by. General Administration of State Environmental Protection
General Administration of State Environmental Protection
Table of Contents
Foreword... 4
1 Application Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Sampling... 6
5 Analysis... 9
6 Quality Assurance and Control... 9
Appendix A... 12
Appendix B... 14
Appendix C... 24
Appendix D... 33
1 Application Scope
This Standard specifies the arrangement of the sampling points for measuring the
volatile organic compounds and carbonyl compounds in crew cabin of motor vehicles,
sampling environment condition and technical requirements, sampling method and
equipment, corresponding measurement method and equipment, data processing,
quality assurance etc.
This Standard is applicable to the sampling and measurement of volatile organic
compounds and carbonyl compounds in cabin of vehicles in static state.
2 Normative References
This Standard cites the provisions of the following documents. For undated documents,
the latest edition of the normative document referred to applies.
GB/T 15089 Classification of Power-driven Vehicles and Trailers
3 Terms and Definitions
For the purpose of this Standard, the following terms and definitions apply.
3.1 Vehicles of categories M1, M2, M3 and N
Adopt the definitions in GB/T 15089.
3.2 Volatile organic constituent
The volatile organic constituent in this Standard is the generic collective term for
volatile compounds using adsorbents such as tenax, and separated by the gas
chromatographic column with the polarity index less than 10, and the retention time is
between that of N-hexane and n-hexadecane.
3.3 Aldehyde ketone constituent
Aldehyde ketone constituent in this Standard is the generic term for compounds which
can be detected by using the method in Appendix C of this Standard, such as methanal,
acetaldehyde, acetone, acrolein, propionaldehyde, crotonaldehyde, butanone,
butyraldehyde, croton aldehyde, benzaldehyde, pentanal, toluyl aldehyde,
cyclohexanone, and hexanal.
4 Sampling
4.1 Technical requirements of sampling
4.1.1 During sampling, the vehicles-to-be-tested shall be in static state under the
environment condition specified in this Standard. The doors, windows, throttles of air
inlet of crew cabin, engine and other equipment (e.g. air conditioner) shall be closed.
4.1.2 The sampling environment at where the vehicles-to-be-tested is located shall
meet the following conditions.
4.2 Arrangement of the sampling points
4.2.2 The sampling point shall be at the same height as that of the breathing zone of
the driver and passengers.
4.3 Sampling apparatus
4.4 Sampling procedure
4.4.1 Preparation stage of vehicles-to-be-tested
4.4.2 Closing stage of vehicles-to-be-tested
4.4.3 Sampling stage
In sampling stage, the sampling environment condition shall meet the requirements of
4.1.2 in this Standard.
4.5 Transportation and storage of samples
The opening of sampling tube shall be sealed with sealing cap; the sampling tube shall
be wrapped with silver paper or aluminum foil, and stored and transported at low
temperature (< 4 °C). The storage time shall not exceed 30d.
5 Analysis
5.1 Determination method for volatile organic constituents
The volatile organic constituents in air pollutants in cabin of vehicles shall be
determined by thermal desorption/capillary gas chromatography/mass spectrometry,
according to the requirements of Appendix B in this Standard.
5.2 Determination method for aldehyde ketone constituent
The aldehyde ketone constituent in air pollutants in cabin of vehicles shall be
determined by solid-phase adsorption/high performance liquid chromatography,
according to the requirements of Appendix B in this Standard.
6 Quality Assurance and Control
6.1 Instrument requirements
Instruments shall meet the technical requirements of relevant national standards, and
shall be timely verified and calibrated, passing metrological verification and within the
validity period.
6.2 Air tightness check
The airtightness of sampling system shall be checked before sampling, air leakage is
not allowed.
6.3 Sampling conduit
Sampling conduit shall be washed and replaced if necessary.
6.4 Flow calibration
The sampling flow of sampling system shall be calibrated with Grade 1 flowmeter (e.g.
Grade 1 soap film flowmeter) before each sampling, under sampling loading condition.
6.5 On-site blank inspection
At least two sampling tubes shall be served as blank in each sampling, and shall be
equally treated as other sampling tubes. As on-site blank during the sampling process,
they shall be delivered to the laboratory together with other sampling tubes.
6.6 Parallel sample inspection
For parallel sampling (not less than two parallel samples), the relative deviation
between measured value difference and the arithmetic mean value shall not exceed 20%.
6.7 Sampling environmental monitoring
6.8 Calibration of sampling volume
When calculating the concentration, the sampling volume shall be converted to the
volume in the normal state according to the following formula.
6.9 Sampling record
Detailed field record shall be made on the conditions of the vehicle-to-be-tested,
sampling date, time, location, quantity, atmospheric pressure, air temperature, relative
humidity, air flow rate, and sampling person(s). The serial numbers of the sampling
tubes shall be recorded and each sample shall be labeled to indicate the serial
numbers of the point positions, sampling date and time, etc. Sampling record shall be
delivered to the laboratory together with the samples. See Appendix D for the sampling record.
Appendix A
(Normative)
Sampling Environmental Chamber
A.1 Technical requirements
A.1.1 The sampling environmental chamber shall be able to meet the sampling
environment condition requirements specified in 4.1.2 of this Standard, within 0.5m
from the outer surface of the vehicle-to-be-tested; and keep it throughout the sampling
process.
A.1.2 Sampling environmental chamber shall have complete envelop enclosure; the
internal surface of chamber body shall be low-release, low-permeability and low-
adsorption material; material and facilities volatilizing pollutants which affect the
background concentration value of environmental pollutant shall not be placed in the
chamber. The chamber shall be large enough to contain the vehicle-to-be-tested and
convenient for testing and sampling by the person(s).
A.1.5 The control accuracy of air conditioning system at 25°C shall be less than or
equal to ±1.0°C, and less than or equal to ±10% when the relative humidity is 50%. At
least 2 temperature and humidity monitoring points shall be arranged in the chamber;
at least one of them shall be within 0.5m from the outer surface of the vehicle-to-be-
tested.
A.1.6 For sampling environmental chamber, online monitoring facilities should be
adopted to continuously monitor the environment condition in the chamber specified in
4.1.2 of this Standard. Online monitoring facilities shall have data storage function.
Environmental pollutant monitoring instrument may monitor the volatile organic
constituents by using online mass spectrum, gas chromatography of hydrogen flame
ionization detector, etc. The positions of the monitoring point shall be within 0.5m from
the outer surface of the vehicle-to-be-tested and at the same height as that of the
positions of sampling points in the vehicle cabin.
A.2 Composition
Generally, sampling environmental chamber is composed of main cabin and air
conditioning system, etc.
Appendix B
(Normative)
Determination Method for Volatile Organic Constituents
(Thermal Desorption/Capillary Gas Chromatography/Mass Spectrometry)
B.1 Application scope
This Appendix specifies the determination method for volatile organic constituents.
Solid-phase adsorbent shall be used to determine volatile organic constituents. When
the sampling volume is 3L, the method detection lower limit of single volatile organic
constituent is 1.5μg/m3.
B.2 Terms and Definitions
B.2.1 Grade 2 desorption
After the sampling tube is heated, the organic constituents are desorbed from the
adsorbent; carrier gas carries the organic constituents into the collecting tube for
adsorption again. And then the organic constituents are rapidly heated to be desorbed
and carried into chromatographic column to separate for determination.
B.2.5 Figure of total ion current (TIC)
The reconstructed ion spectrogram that is generated by mass spectrometric detector
in full scan mode.
B.3 Method principle
Collect air samples of a certain volume from the cabin of vehicle with the sampling tube
filled with solid-phase adsorbents; and collect the volatile organic constituents in the
samples to the sampling tube. Purge them with dry inert gas; then bring the organic
constituents into capillary gas chromatography-mass spectrometer for qualitative and
quantitative analysis.
B.4 Reagents and materials
The reagent used during the analytic process shall be chromatographically pure.
B.4.1 Standard sample (standard substance)
Prepare the standard gas or liquid into the standard gas of the required concentration;
use constant-flow gas sampler to collect it in certain quantity to an activated sampling
tube to form standard series. The concentration of the analyte of the prepared standard
series shall be similar to that of the sample intended to be analyzed. During the
collecting process, standard gas shall be collected at the same flow rate as that used
for sampling.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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