HJ 1058-2019 English PDFUS$259.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. HJ 1058-2019: Determination of ozone-depleting substances including CFC-12,HCFC-22,CFC-11 and HCFC-141b in rigid polyurethane foam and pre-blended polyether polyols -- Portable headspace/gas chromatography-mass spectrometry Status: Valid
Basic dataStandard ID: HJ 1058-2019 (HJ1058-2019)Description (Translated English): Determination of ozone-depleting substances including CFC-12,HCFC-22,CFC-11 and HCFC-141b in rigid polyurethane foam and pre-blended polyether polyols -- Portable headspace/gas chromatography-mass spectrometry Sector / Industry: Environmental Protection Industry Standard Classification of Chinese Standard: Z15 Classification of International Standard: 13.040.99 Word Count Estimation: 11,151 Date of Issue: 2019 Date of Implementation: 2019-10-31 Issuing agency(ies): Ministry of Ecology and Environment HJ 1058-2019: Determination of ozone-depleting substances including CFC-12,HCFC-22,CFC-11 and HCFC-141b in rigid polyurethane foam and pre-blended polyether polyols -- Portable headspace/gas chromatography-mass spectrometry---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. (Determination of ozone depleting substances such as CFC-12, HCFC-22, CFC-11 and HCFC-141b in rigid polyurethane foams and combined polyethers. Portable headspace/gas chromatography-mass spectrometry) National Environmental Protection Standard of the People's Republic of China CFC-12, HCFC-22, Determination of ozone depleting substances such as CFC-11 and HCFC-141b Portable headspace/gas chromatography-mass spectrometry Determination of ozone-depleting substances including CFC-12, HCFC-22, CFC-11 and HCFC-141b in rigid polyurethane foam and pre-blended polyether polyols-Portable headspace/gas chromatography-mass spectrometry Published on October 31,.2019 2019-10-31 Implementation Released by the Ministry of Ecology and Environment ContentsForeword ... ii 1 Scope ... 1 2 Methodology ... 1 3 Terms and definitions ... 1 4 Reagents and materials ... 2 5 Instruments and equipment ... 2 6 Sample ... 2 7 Analysis steps ... 3 8 Results representation ... 4 9 Quality Assurance and Quality Control ... 5 10 Waste disposal ... 5 11 Notes ... 5 Appendix A (informative) Target ions and auxiliary ions of target compounds ... 6 Appendix B (informative) Total ion chromatogram of target compound ... 7ForewordIn order to implement the "Environmental Protection Law of the People's Republic of China" Environment, protect human health, regulate CFC-12, HCFC-22, CFC-11 and HCFC-141b and other ozone-depleting substances are determined by this standard. This standard specifies CFC-12, HCFC-22, CFC-11 and HCFC-141b in rigid polyurethane foams and combined polyethers. Determination of portable headspace/gas chromatography-mass spectrometry. Appendix A and Appendix B of this standard are informative appendices. This standard is issued for the first time. This standard is formulated by the Department of Eco-Environmental Monitoring, Laws and Standards Department of the Ministry of Ecology and Environment. This standard was drafted. China Environmental Monitoring Station. Verification units of this standard. National Environmental Analysis and Testing Center, Zhejiang Environmental Monitoring Center, Shandong Province Ecological Environment Monitoring Center, Guangdong Environmental Monitoring Center, Tianjin Ecological Environment Monitoring Center and Chongqing Ecological Environment Monitoring Center. This standard was approved by the Ministry of Ecology and Environment on October 31,.2019. This standard will be implemented from October 31,.2019. This standard is explained by the Ministry of Ecology and Environment. CFC-12, HCFC-22, CFC-11 in rigid polyurethane foam and combination polyether And ozone depleting substances such as HCFC-141b and portable headspace/gas phase color Spectrum-mass spectrometry Warning. The standard used in this method is volatile and toxic chemicals. Protective equipment should be worn in accordance with requirements. Avoid inhalation or contact with skin and clothing.1 ScopeThis standard specifies the determination of difluoromethylene chloride (CFC-12), difluoromethylene chloride in rigid polyurethane foam and combined polyethers. Ozone depleting substances such as alkane (HCFC-22), monofluorotrichloromethane (CFC-11) and monofluorodichloroethane (HCFC-141b) Quality portable headspace/gas chromatography-mass spectrometry. This standard applies to CFC-12, HCFC-22, CFC-11 and HCFC-141b in rigid polyurethane foams and combined polyethers. Qualitative detection. When using rigid polyurethane foam as the test object, under the conditions specified in this standard, CFC-12, HCFC-22, CFC-11 The method detection limits for HCFC-141b and HCFC-141b are 2 µg, 2 µg, 2 µg, and 0.6 µg, respectively. When the combined polyether is used as the test object, under the conditions specified in this standard, CFC-12, HCFC-22, CFC-11 and The method detection limits of HCFC-141b are 3 µg, 2 µg, 2 µg, and 0.9 µg, respectively.2 Method principleUnder a certain temperature condition, the target compound in the sample in the headspace bottle volatilizes to the liquid (solid) space, resulting in a certain The vapor pressure and gas-liquid (solid) two-phase dynamic equilibrium are reached. The target compound in the gas phase is purged with high purity carrier gas and adsorbed on In the built-in loop of a portable gas chromatography-mass spectrometer, the target compound in the loop is blown back into the carrier gas with high purity. After separation by gas chromatography, it was detected by a mass spectrometer and qualitatively compared with the retention time and mass spectrum of a standard substance.3 terms and definitionsThe following terms and definitions apply to this standard. 3.1 Rigid polyurethane foam Abbreviated as polyurethane rigid foam, it uses isocyanate and polyether as the main raw materials. It is widely used in foaming agents, catalysts, flame retardants, etc. Under the action of additives, high-molecular polymers that are mixed by special equipment and foamed on-site by high-pressure spraying. 3.2 Pre-blended polyether polyols The mixture is composed of monomer polyether, foaming agent, cross-linking agent, catalyst, foam stabilizer and other components. Production hard One of the two-component raw materials of high quality polyurethane foam, commonly known as white material. 3.3 Ozone-depleting substances Chemicals that have a destructive effect on the ozone layer and are included in the China List of Controlled Ozone Depleting Substances.4 Reagents and materialsUnless otherwise specified, analytical reagents that meet national standards are used. Experimental water is free of target compounds Of distilled water or water prepared by pure water equipment. 4.1 Difluoromethylene chloride (CFC-12) standard solution. commercially available certified standard solution, the solvent is methanol. 4.2 Difluoromonochloromethane (HCFC-22) standard solution. commercially available certified standard solution, the solvent is methanol. 4.3 Monofluorotrichloromethane (CFC-11) standard solution. commercially available certified standard solution, the solvent is methanol. 4.4 Monofluorodichloroethane (HCFC-141b) standard solution. commercially available certified standard solution, the solvent is methanol. 4.5 Carrier gas. nitrogen, purity ≥99.999%.5 Instruments and equipment5.1 Portable gas chromatograph-mass spectrometer. with loop injection function. The chromatographic part has the function of program temperature rise, the mass spectrometry part Electron Impact (EI) Ionization Source with 70 eV, with NIST Mass Library, Full Scan (SCAN), Manual/Auto Dynamic tuning, data acquisition and library search. 5.2 Headspace sampler. can be directly connected to the chromatographic section, and the sample can be purged to the portable gas chromatography-mass spectrometer by carrier gas Instrument inside the host. 5.3 Capillary column. 30 m × 0.32 mm, 1.0 m film thickness (100% polyethylene glycol), or 10 m × 0.1 mm, 0.2 m film thickness (100% polyethylene glycol). Other equivalent capillary columns can also be used. 5.4 Pipette. 20 μl, 5 ml or 10 ml. 5.5 Utility knife. metal. 5.6 Medicine spoon. metal material. 5.7 Sample vial. 40 ml brown screw-top glass bottle, Teflon-lined silicone rubber pad, or with headspace sampler (5.2) Matching glass bottles. 5.8 Sampling spoon. long handle, metal material. 5.9 General laboratory instruments and equipment.6 samples6.1 Sample collection and storage Rigid polyurethane foam. For each batch of foam products, 3 packaging units are randomly selected for sample collection; when packaging When there are less than 10 units, 1 or 2 packaging units can be selected for sample collection as appropriate. Collect 2 samples per packaging unit, One for analysis and one for preservation. When collecting samples, use a utility knife (5.5) on any of the rigid polyurethane foam Take a cube whose length, width and height are not less than 10 cm. If the sample cannot be tested on site, it should be at room temperature. Transported and stored under light-proof and sealed condition, the test was completed within 10 days. Note. If rigid polyurethane foam with a length, width and height of not less than 10 cm cannot be collected on site, the sample size can be adjusted according to the actual situation. The product volume meets at least the requirements of 6.2 sample preparation. Combination polyether. For each batch of combination polyether, randomly select 3 packaging units for sample collection; when there are few packaging units At 10 hours, 1 ~ 2 packaging units can be selected for sample collection as appropriate. Collect 2 samples per packaging unit, 1 For analysis, 1 for sample retention. When collecting samples, use a sampling spoon (5.8) to collect the combined polymer from the original storage container. Ether, and then slowly introduce the sample from the sampling spoon into the sample bottle (5.7) along the wall until it is full and leaves no space. When sampling Minimize or reduce sample exposure to air. The samples should be analyzed as soon as possible after collection. If the samples cannot be tested on site, It should be transported and stored under normal temperature and protected from light. The test is completed within 10 days. 6.2 Preparation of test specimens Rigid polyurethane foam sample. Use a utility knife (5.5) to cut a volume of about 1 cm3 (length, width, and height are 1 cm) Left and right) cubes and put them into the sample bottle (5.7) as soon as possible, all 6 sides of the cube must be new cutouts, to ensure 6 flat The surface was not in contact with the ambient air before cutting. Try to avoid or reduce sample exposure to air during sampling. Combined polyether sample. Add 10 ml of experimental water to the sample bottle (5.7), and then use a medicine spoon (5.6) to hold about 10 mg Combine left and right (approximately mung bean size) polyether samples in a sample bottle (5.7), seal the sample bottle quickly, shake immediately after mixing During analysis, try to avoid or reduce sample exposure to air when taking samples. After the sample is collected, the test will be performed on site as soon as possible. Note. The sample is detected by mass spectrometry. If the target compound has a flat-headed peak, which affects the qualitative judgment of the adjacent target compound, the amount of sample should be reduced Or re-measure the sample after dilution. 6.3 Blank sample When testing rigid polyurethane foam samples. Replace the sample with ambient air as a blank sample. When testing combined polyether samples. Use experimental water instead of samples as blank samples.7 Analysis steps7.1 Instrument reference conditions 7.1.1 Headspace injection reference conditions Heating equilibration temperature. 50 ℃; heating equilibration time. 10 min; sampling needle temperature. 60 ℃; transmission line temperature. 60 ℃; quantitative The ring volume is.200 μl or 400 μl. 7.1.2 Gas chromatography reference conditions Program temperature increase. keep it at 50 ℃ for 3 minutes, increase it to 180 ℃ at 25 ℃/min, and keep it for 3 minutes; Set according to the instrument's instruction manual. 7.1.3 Mass spectrometry reference conditions Scanning range. 41 ~ 300 amu; Ionization energy. 70 eV; Scanning method. Full scan (SCAN); Other parameters Set according to the instrument instruction manual. See Figure B in Appendix B for the total ion chromatogram obtained by measuring the standard solution of the target compound under the reference conditions. 7.2 Calibration 7.2.1 Instrument performance check After starting up, first check the instrument performance of the GC-MS system and run the corresponding check according to the instrument manual. In order to ensure the accuracy of the test results, the mass spectrometry function should be tuned after starting up or running continuously for 12 hours. Instrument use requirements. 7.2.2 Establishment of Qualitative Conditions for Target Compounds Dilute the standard solution (4.1 ~ 4.4) with experimental water to prepare the target compound with a concentration of.200 μg/L. standard solution. Analyze according to the instrument reference conditions (7.1) to obtain the retention time and standard quality of each target compound Spectrogram. 7.3 Sample determination Measure the prepared sample (6.2) according to the instrument conditions (7.1). Note. After analyzing a high-content sample, one or more blank samples should be analyzed for cross-contamination. If cross-contamination occurs, Bake the instrument pipeline and other corresponding measures to confirm that there is no contamination before continuing the test. 7.4 Blank test The blank sample (6.3) is measured under the same instrument conditions as the sample measurement (7.3).8 result representation8.1 Qualitative analysis Compare the retention time (RT) of the target compound in the sample, the ratio of the auxiliary ion and the target ion abundance with the standard sample. Qualitative. The target ion and auxiliary ion of the target compound are detailed in Appendix A. The calibration solution should be analyzed on-site to obtain the retention time of the target compound. The retention time deviation of the solution should not be greater than 10 s. All ions with a relative abundance greater than 30% in the standard mass spectrum of the target compound should be present in the sample mass spectrum. The relative abundance deviation of the above-mentioned characteristic ions in the mass spectrum and the standard mass spectrum should be within ± 30%. If the actual sample exists Show the background interference, the background effect should be deducted when comparing. 8.2 Results representation Results are expressed as "checked out" or "not checked out."9 Quality Assurance and Quality Control9.1 Prior to the determination of each sample, a blank sample (6.3) shall be analyzed. The target compound shall not be detected in the blank sample. 9.2 Every 10 samples or each batch of samples (≤10 samples/batch) should be analyzed in a parallel sample. Consistent. 10 Waste treatment The waste liquid and waste generated in the experiment should be collected centrally, be marked accordingly, and be entrusted to a qualified unit for processing. 11 matters needing attention The sampling tools should be thoroughly washed before use. When collecting samples from different packaging units, pay attention to cleaning or replacing sampling workers. With.Appendix A(Informative appendix) Target ion and auxiliary ion of target compound Table A gives the Chinese and English names, target ions, and auxiliary ions of the target compound in the order of the peaks. Table A Target ions and auxiliary ions of target compounds Peak order Target compound Chinese name Target compound English name CAS number type Target ion (M/z) Auxiliary ion (M/z) Difluoromethylene chloride (CFC-12) Difluorodichloromethane 75-71-8 Target compounds 85 87, 50, 101 Difluoromethane (HCFC 22) Difluorochloromethane 75-45-6 Target compounds 51 67, 69, 50 Monofluorotrichloromethane (CFC-11) Trichloromonofluoromethane 75-69-4 Target compounds 101 103, 105, 66 Monofluorodichloroethane (HCFC 141b) 1,1-Dichloro-1-fluoroethane 1717-00-6 Target compound 81 83, 61, 101Appendix B(Informative appendix) Total ion chromatogram of target compound 1-difluoromethylene chloride (CFC-12); 2-difluoromonochloromethane (HCFC-22); 3-monofluorotrichloromethane (CFC-11); 4-monofluorodichloroethane (HCFC-141b) Figure B Total ion chromatogram of a 50 µg target compound ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of HJ 1058-2019_English be delivered?Answer: Upon your order, we will start to translate HJ 1058-2019_English as soon as possible, and keep you informed of the progress. 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