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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. HJ 583-2010: Ambient air. Determination of benzene and its analogies using sorbent adsorption thermal desorption and gas chromatography Status: Valid
Basic dataStandard ID: HJ 583-2010 (HJ583-2010)Description (Translated English): Ambient air. Determination of benzene and its analogies using sorbent adsorption thermal desorption and gas chromatography Sector / Industry: Environmental Protection Industry Standard Classification of Chinese Standard: Z15 Classification of International Standard: 13.040.20 Word Count Estimation: 15,136 Date of Issue: 2010-09-20 Date of Implementation: 2010-12-01 Older Standard (superseded by this standard): GB/T 14677-1993 Regulation (derived from): Department of Environmental Protection Notice No. 68 of 2010 Issuing agency(ies): Ministry of Ecology and Environment Summary: This standard specifies the determination of BTEX in air solid adsorption/thermal desorption gas chromatography. This standard applies to the ambient air and indoor air benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, cumene and styrene determination. This standard also applies to the low ambient temperature exhaust gas BTEX concentration determination. If the sample size is 1L, benzene, toluene, ethylbenzene, o- xylene, m-xylene, p-xylene, cumene and styrene, and the measurement lower limit of detection, Table l. HJ 583-2010: Ambient air. Determination of benzene and its analogies using sorbent adsorption thermal desorption and gas chromatography---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Ambient air.Determination of benzene and its analogies using sorbent adsorption thermal desorption and gas chromatography National Environmental Protection Standard of the People's Republic Replace GB/T 14677-93 Determination of benzene in ambient air Solid adsorption/thermal desorption-gas chromatography Ambient air-Determination of benzene and its analogies using sorbent Adsorption thermal desorption and gas chromatography Released on.2010-09-20 2010-12-01 Implementation Ministry of Environmental Protection released Ministry of Environmental Protection announcement No. 68 of.2010 In order to implement the "Environmental Protection Law of the People's Republic of China", protect the environment, and protect human health, we now approve the "environmental air benzene series" Five standards, such as solid adsorption/thermal desorption-gas chromatography, are considered as national environmental protection standards and are released. The standard name and number are as follows. 2. Determination of Benzene in Ambient Air Activated Carbon Adsorption/Carbon Disulfide Desorption - Gas Chromatography (HJ 584-2010); 3. Determination of free chlorine and total chlorine in water, N,N-diethyl-1,4-phenylenediamine titration method (HJ 585-2010); 4. Determination of free chlorine and total chlorine in water - N,N-diethyl-1,4-phenylenediamine spectrophotometric method (HJ 586-2010); V. "Determination of water quality atrazine by high performance liquid chromatography" (HJ 587-2010). The above standards have been implemented since December 1,.2010 and published by the China Environmental Science Press. The standard content can be found on the website of the Ministry of Environmental Protection. From the date of implementation of the above standards, the following four national environmental protection standards approved and issued by the former National Environmental Protection Agency shall be abolished. The name and number are as follows. I. Determination of Air Quality, Toluene, Xylene and Styrene by Gas Chromatography (GB/T 14677-93); 2. Determination of Air Quality Styrene by Gas Chromatography (GB/T 14670-93); 3. Determination of free chlorine and total chlorine in water. N,N-diethyl-1,4-phenylenediamine titration method (GB 11897-89); 4. Determination of free chlorine and total chlorine in water quality N,N-Diethyl-1,4-phenylenediamine spectrophotometric method (GB 11898-89). Special announcement. September 20,.2010 ContentForeword..iv 1 Scope..1 2 Method principle..1 3 reagents and materials.1 4 instruments and equipment. 2 5 samples. 2 6 Analysis steps..3 7 Calculation and representation of results..5 8 precision and accuracy..5 9 Quality Assurance and Quality Control 5 Appendix A (informative) Filling method of packed column..7 Appendix B (informative) Safe sampling volume of benzene series 8 Appendix C (informative) Summary of precision and accuracy Table 9 IvForewordIn order to implement the Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China on the Prevention and Control of Air Pollution, protect the environment and protect people The body is healthy, and the method for determining the determination of benzene in the air is formulated. This standard specifies the determination of benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, isopropyl in ambient air and indoor air. Solid adsorption/thermal desorption of benzene and styrene - gas chromatography. This standard is a revision of the "Gas Chromatography for the Determination of Air Quality of Toluene, Xylene and Styrene" (GB/T 14677-93). This standard was first published in.1993. The original standard drafting unit was Shenyang Environmental Science Research Institute. This is the first revision. This repair The main contents of the subscription are as follows. -- Revise the standard name to "Determination of Benzene in Ambient Air by Solid Adsorption/Thermal Desorption - Gas Chromatography"; -- The target component is increased from five to eight; - modifying the standard solution matrix from carbon disulfide to methanol; -- Added secondary desorption capillary column analysis method; -- Added quality assurance and quality control provisions. As of the date of implementation of this standard, the national environmental protection standard “Air” approved and issued by the former National Environmental Protection Agency on September 18,.1993 Determination of mass of toluene, xylene and styrene by gas chromatography (GB/T 14677-93) is abolished. Appendix A to Appendix C of this standard are informative annexes. This standard was formulated by the Science and Technology Standards Department of the Ministry of Environmental Protection. This standard is mainly drafted by. Dalian Environmental Monitoring Center. This standard is verified by. Anshan Environmental Monitoring Center Station, Jinzhou Environmental Monitoring Center Station, Shenyang Environmental Monitoring Center Station, Liaoning Provincial Environmental Monitoring Experimental Center and Yingkou Environmental Monitoring Center Station. This standard was approved by the Ministry of Environmental Protection on September 20,.2010. This standard has been implemented since December 1,.2010. This standard is explained by the Ministry of Environmental Protection. Determination of benzene in ambient air Solid adsorption/thermal desorption-gas chromatography1 Scope of applicationThis standard specifies solid adsorption/thermal desorption-gas chromatography for the determination of benzene in air. This standard applies to ambient air and indoor air benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, cumene and Determination of styrene. This standard is also applicable to the determination of benzene series in low concentration exhaust gas at normal temperature. Method for benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, cumene and styrene when the sampling volume is 1 L The detection limit and the lower limit of measurement are shown in Table 1. Table 1 Method detection limit and lower limit of measurement Unit. mg/m3 Component capillary column gas chromatography packed column gas chromatography method detection limit detection limit method detection limit lower limit Benzene 5.0×10−4 2.0×10−3 5.0×10−4 2.0×10−3 Toluene 5.0×10−4 2.0×10−3 1.0×10−3 4.0×10−3 Ethylbenzene 5.0×10−4 2.0×10−3 1.0×10−3 4.0×10−3 Paraxylene 5.0×10−4 2.0×10−3 1.0×10−3 4.0×10−3 M-xylene 5.0×10−4 2.0×10−3 1.0×10−3 4.0×10−3 O-xylene 5.0×10−4 2.0×10−3 1.0×10−3 4.0×10−3 Cumene 5.0×10−4 2.0×10−3 1.0×10−3 4.0×10−3 Styrene 5.0×10−4 2.0×10−3 1.0×10−3 4.0×10−32 Principle of the methodEnriching ambient air or benzene in indoor air at room temperature with a packed tube of poly 2,6-diphenyl-p-phenylene ether (Tenax) The sample tube is connected to the thermal desorber, and after heating, the adsorbed component is introduced into a gas chromatograph with a hydrogen flame ionization detector (FID). analysis.3 reagents and materialsAnalytical purification reagents that meet national standards were used for analysis unless otherwise stated. 3.1 Methanol. chromatographically pure. 3.2 Standard stock solution. Take appropriate amount of chromatographically pure benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, cumene and phenylethyl The alkene is formulated in a volume of methanol (3.1). A certified standard solution can also be used. 3.3 Carrier gas. nitrogen, purity 99.999%, purified with a purification tube. 3.4 Combustion gas. hydrogen, purity 99.99%. 3.5 Gas. Air, cleaned with a clean tube.4 Instruments and equipment4.1 Gas Chromatograph. equipped with FID detector. 4.2 Column 4.2.1 Packed column. made of hard glass or stainless steel, 2 m long, inner diameter 3 to 4 mm, filled with 2.5% phthalic acid diterpene Chromsorb G·DMCS (80-100 mesh) of ester (DNP) and 2.5% bentonite-34 (bentane). See the preparation method of packed column Appendix A. 4.2.2 Capillary column. The fixing solution is polyethylene glycol (PEG-20M), 30 m × 0.32 mm, film thickness 1.00 μm or equivalent capillary column. 4.3 Thermal desorption device It has a first-level desorption or secondary desorption function, and can be purchased by professional manufacturers or by themselves. The thermal desorption unit can continuously adjust the temperature, the highest The temperature can reach 300 ° C, and the temperature can be kept constant when the temperature reaches the set value. After the sampling tube is mounted on the thermal desorber, both ends of the sampling tube and The entire system is not leaking. The temperature of the transmission line connected to the gas chromatograph should be maintained above 100 °C. Thermal desorbers with freeze focus are also suitable for this standard. 4.4 aging device The temperature is controllable at.200-400 ° C while maintaining a certain nitrogen flow rate. 4.5 Sample collection device Oil-free sampling pump, flow rate range of 0.01 ~ 0.1 L/min and 0.1 ~ 0.5 L/mim, flow stability. 4.6 sampling tube The material of the sampling tube is stainless steel or hard glass, filled with not less than.200 mg of Tenax (60-80 mesh) adsorbent (or other etc.) The adsorbent is fixed at both ends with a stainless steel mesh or quartz wool having a pore smaller than the particle size of the adsorbent to prevent the adsorbent from falling. The position of the adsorbent in the tube Set at least 15 mm from the inlet end of the tube and the length of the adsorbent should not exceed the size of the heated zone. The sampling tube can be purchased directly or it can be Fill in. 4.7 Thermometer. Accuracy 0.1 °C. 4.8 Barometer. Accuracy of 0.01 kPa. 4.9 Microsampler. 1 ~ 5 μl. 4.10 Common instruments and equipment used in general laboratories.5 samples5.1 Preparation of sampling tube The newly filled sampling tube is aged with an aging device or a thermal desorber with aging function, the aging flow rate is 50 ml/min, and the temperature is 350 ° C, time is 120 min; used sampling tube should be aged at 350 ° C for more than 30 min. Both ends of the sampling tube after aging are used immediately The Teflon cap is sealed and stored in a sealed bag or protective tube. The sealed bag or protective tube is stored in a box or dryer equipped with activated carbon. Store at 4 ° C. The aging tube should be used within two weeks. 5.2 Sample Collection 5.2.1 The sampler should be calibrated before sampling. At the sampling site, connect a sampling tube to the air sampling device to adjust the sampling. Device flow, this sampling tube is only used to adjust the flow, no sampling analysis. 5.2.2 At room temperature, remove the PTFE cap on both sides of the aging tube and connect it to the sampler according to the flow direction on the sampling tube. Check the air tightness of the sampling system. The air was collected at a flow rate of 10 to.200 ml/min for 10 to 20 minutes. If the scene contains more particles in the atmosphere The filter head can be connected in front of the sampling tube. Record sampler flow, current temperature, and air pressure simultaneously. At 20 ° C, the components of the benzene series are filled There is a safe sampling volume in a.200 mg Tenax-TA adsorption tube, see Appendix B. 5.2.3 Before sampling is completed, record the sampling flow again, take off the sampling tube, and immediately seal with a Teflon cap. 5.3 Sample storage Immediately after sampling the sampling tube, the ends of the sampling tube were sealed with a Teflon cap, sealed at 4 ° C in the dark, and analyzed within 30 days. 5.4 Collection of blank samples on site Transport the aged sampling tube to the sampling site, remove the Teflon cap and reseal it, do not participate in sample collection, and have collected The sample tube is stored together. At least one blank sample of the field should be collected each time the sample is taken.6 Analysis steps6.1 Instrument selection 6.1.1 When the selected thermal desorption device has only one-stage desorption function, a gas chromatograph with a packed column should be used. 6.1.2 When the selected thermal desorption device has a secondary desorption function, a gas chromatograph with a capillary column should be used. When a capillary column is selected, the inner diameter of the capillary column is selected based on the recommended thermal desorption flow rate of the secondary desorption focus tube. In general, the focus tube It is recommended to use a capillary column with a 0.25 mm inner diameter when the thermal desorption flow rate is less than 2.0 ml/min; when the focus tube recommends a thermal desorption flow greater than For 2.0 ml/min, a capillary column with an inner diameter of 0.32 mm or more can be used. The fixative is polyethylene glycol and the capillary has a thickness greater than 1.0 μm. Column (4.2.2) has a good separation of the target components of this standard. 6.2 Recommended analysis conditions 6.2.1 Primary thermal desorption, packed column gas chromatography reference conditions 6.2.1.1 Thermal Desorber Carrier gas flow rate. 50 ml/min; valve temperature. 100 ° C; transmission line temperature. 150 ° C; desorption temperature. 250 ° C; desorption time. 3 min. 6.2.1.2 packed column gas chromatography Carrier gas flow rate. 50 ml/min; inlet temperature. 150 ° C; detector temperature. 150 ° C; column temperature. 65 ° C; hydrogen flow. 40 ml/min; Air flow. 400 ml/min. 6.2.2 Secondary thermal desorption, capillary column gas chromatography reference conditions 6.2.2.1 Thermal Desorber Initial sampling tube temperature. 40 ° C; initial temperature of focusing tube. 40 ° C; dry blowing temperature. 40 ° C; dry blowing time. 2 min; With temperature. 250 ° C; sampling tube desorption time. 3 min; sampling tube desorption flow. 30 ml/min; focusing tube desorption temperature. 250 ° C; The desorption time of the coke tube was 3 min; the temperature of the transmission line was 150 °C. 6.2.2.2 Capillary column gas chromatography Oven temperature. 80 ° C constant temperature; column flow rate. 3.0 m/min; inlet temperature. 150 ° C; detector temperature. 250 ° C; Amount. 30 ml/min; hydrogen flow. 40 ml/min; air flow. 400 ml/min. 6.3 Calibration 6.3.1 Calibration curve drawing Take appropriate amount of standard stock solution (3.2), dilute with methanol (3.1) and dilute to 1.00 ml, the mass concentration is 5, Calibration series of 10, 20, 50 and 100 μg/ml. Connect the aged sample tube to the packed column inlet of another gas chromatograph, or similar to the GC packed column inlet function Self-made device, set the inlet (device) temperature to 50 ° C, use a syringe to inject 1.0 μl standard series solution, use a flow of 100 ml/min Pass the carrier gas (3.3) for 5 min, quickly remove the sampling tube, and seal the ends of the sampling tube with a Teflon cap to obtain 5, 10, 20, 50 and 100 ng calibration curve series sampling tube. Connect the calibration curve series sampling tube to the thermal desorption instrument in the opposite direction of the airflow when adsorbing the standard solution. Analysis, drawing a calibration curve based on the target component mass and response value. Note. If the thermal desorber has a liquid standard substance inlet, a certain amount of standard solution can be directly injected to calibrate the curve. 6.3.2 Standard chromatogram 6.3.2.1 Filled column reference chromatogram, see Figure 1. 1-Benzene; 2-toluene; 3-ethylbenzene; 4-p-xylene; 5-m-xylene; 6-o-xylene; 7-isopropylbenzene; 8-styrene. Figure 1 Filled column chromatogram 6.3.2.2 Capillary column reference chromatogram, see Figure 2. 1-Benzene; 2-toluene; 3-ethylbenzene; 4-p-xylene; 5-m-xylene; 6-isopropylbenzene; 7-o-xylene; 8-styrene. Figure 2 Capillary column chromatogram 6.4 Determination The sample sampling tube is mounted on the thermal desorber, and the direction of the carrier gas flow in the sample tube is opposite to the direction of sampling, and the analysis conditions are adjusted. (6.2), after the target component is desorbed, it is separated by gas chromatography and detected by FID. Record the retention time and corresponding values of the chromatographic peaks. 6.4.1 Qualitative analysis Qualified according to retention time. 6.4.2 Quantitative analysis The content of the target component is calculated based on the calibration curve. 6.5 Blank test The blank tube on site is measured in the same batch as the sample tube that has been sampled, and the analysis steps are the same as in the measurement (6.4).7 Calculation and representation of results7.1 The concentration of the target compound in the gas is calculated according to formula (1). Nd 1 000 WW ρ −= × (1) Where. ρ--the mass concentration of the component to be tested in the gas, mg/m3; W--thermal desorption injection, the mass of the measured component calculated from the calibration curve, ng; W0--the mass of the component to be tested in the blank tube calculated from the calibration curve, ng; Vnd - the sampling volume in the standard state (101.325 kPa, 273.15 K), L. 7.2 Results representation When the measurement result is less than 0.1 mg/m3, it is retained to four decimal places; when it is 0.1 mg/m3 or more, three significant figures are retained.8 precision and accuracy8.1 Precision Packed Column Gas Chromatography. Five laboratories measured uniform samples at 1.0 ng and 50.0 ng, respectively, in the laboratory. The relative standard deviation range is 0.6%~2.3%, 0.4%~2.7%, and the relative standard deviation between laboratories ranges from 0.6% to 1.5%, 0.3%~ 0.7%, the repeatability limit ranged from 0.04 to 0.05 ng, 1.91 to 2.81 ng, and the reproducibility range was 0.04 to 0.06 ng, 2.03 to 2.81 ng. See Appendix C for detailed parameters. Capillary Column Gas Chromatography. Five laboratories measured uniform samples at 1.0 ng and 50.0 ng, respectively. The internal relative standard deviation range is 0.8% to 2.3%, 0.8% to 2.7%, and the relative standard deviation between laboratories ranges from 0.8% to 2.3%, 0.6%. 1.5%; reproducibility limits range from 0.03 to 0.06 ng, 1.72 to 2.94 ng, and reproducibility limits range from 0.04 to 0.07 ng, 1.72 to 3.12 ng. See Appendix C for detailed parameters. 8.2 Accuracy Five laboratories tested two standard samples of mass concentration, and the final value of the relative error of packed column gas chromatography was −0.8%~2.6%, the final value of the spiked recovery range is 92.1%~106%; the final value of the relative error of capillary column gas chromatography is −1.0%~3.5%, the final value of the spiked recovery rate ranges from 93.4% to 106%. See Appendix C for detailed parameters.9 Quality Assurance and Quality Control9.1 Main contamination of sample residues from the Tenax sampling tube. The sampling tube should be fully aged before sampling to remove sample residue. The residual amount should be Less than 1/4 of the lowest point of the calibration curve. The sampling tube should be kept in a closed state during transportation and storage. 9.2 The residual amount of the target compound in the blank sample should be less than 1/4 of the sample. When the data is suspicious, this batch of data should be verified and an examination. 9.3 The ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of HJ 583-2010_English be delivered?Answer: Upon your order, we will start to translate HJ 583-2010_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of HJ 583-2010_English with my colleagues?Answer: Yes. The purchased PDF of HJ 583-2010_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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