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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. HJ 871-2017: Ambient air. Determination of chlorine and other hazardous air pollutants in emergency monitoring. Length detector tube method Status: Valid
Basic dataStandard ID: HJ 871-2017 (HJ871-2017)Description (Translated English): Ambient air. Determination of chlorine and other hazardous air pollutants in emergency monitoring. Length detector tube method Sector / Industry: Environmental Protection Industry Standard Classification of Chinese Standard: Z15 Classification of International Standard: 13.040.20 Word Count Estimation: 15,131 Date of Issue: 2017-11-28 Date of Implementation: 2018-01-01 Quoted Standard: GB/T 7230; HJ 589 Regulation (derived from): Ministry of Environmental Protection Announcement 2017 No. 59 Issuing agency(ies): Ministry of Ecology and Environment Summary: This standard specifies the determination of chlorine, carbon monoxide, hydrogen sulfide, hydrogen chloride, hydrogen cyanide, phosgene, hydrogen fluoride, ammonia, formaldehyde, styrene, arsine, ozone, sulfur dioxide, nitrogen oxides, benzene and toluene in ambient air. 16 kinds of harmful gases than the long detection tube method. This standard is a qualitative semi-quantitative method applicable to chlorine, carbon monoxide, hydrogen sulfide, hydrogen chloride, hydrogen cyanide, phosgene, hydrogen fluoride, ammonia, formaldehyde, styrene, hydrogen arsenide, ozone, sulfur dioxide, nitrogen oxides in ambient air. On-site emergency monitoring of harmful gases such as benzene and toluene, and preliminary investigations such as screening and census. See Appendix A for the common measurement range of the target. HJ 871-2017: Ambient air. Determination of chlorine and other hazardous air pollutants in emergency monitoring. Length detector tube method---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 chlorine and other toxic and hazardous gases than the long-term monitoring of emergency detection tube method) People's Republic of China national environmental protection standards Ambient air, chlorine and other toxic and harmful gases Emergency monitoring than long-type test tube method Ambient air-Determination of chlorine and other hazardous air pollutants in emergency monitoring-Length detector tube method Ministry of Environmental Protection released 2017-11-28 Posted 2018-01-01 implementation i directory Preface ... ii 1 Scope ...1 2 Normative references ...1 3 method principle ...1 4 Interference and elimination ...1 5 Instruments and Equipment ...2 6 Preparation before sampling ...2 7 Sample Collection and Measurement ... 3 8 Calculation and Expression of Results ... 4 9 Quality Assurance and Quality Control ... 4 10 Waste Treatment ... 5 11 Notes ... 5 Appendix A (informative) Common measurement range, method and principle, interference and elimination and precautions ... 6 Appendix B (informative) Laboratory precision and accuracy ... 12 ForewordIn order to implement the Law of the People's Republic of China on Environmental Protection and the Law of the People's Republic of China on Prevention and Control of Atmospheric Pollution, protect the environment and protect people Physical health, standardize environmental air emergency monitoring work, the development of this standard. This standard specifies the determination of ambient air chlorine, carbon monoxide, hydrogen sulfide, hydrogen chloride, hydrogen cyanide, phosgene, hydrogen fluoride, ammonia, Formaldehyde, styrene, arsine, ozone, sulfur dioxide, nitrogen oxides, benzene and toluene, and other 16 kinds of harmful gases than the long detection tube method. This standard Appendix A and Appendix B is an informative annex. This standard is released for the first time. This standard by the Environmental Protection Department of Environmental Monitoring Division and Science and Technology Standards Division to develop. This standard was drafted. Shenyang Environmental Monitoring Center Station, Beijing Institute of Labor Protection. This standard MEP approved on November 28,.2017. This standard since January 1,.2018 come into operation. This standard is interpreted by the MEP. 1 Ambient air Chlorine and other toxic and hazardous gas emergency monitoring than the long-type test tube method Warning. The carrier used in this method is toxic and should be kept away from the skin and clothing. Use test tubes or field should be Acute monitoring should pay attention to its own protection.1 scope of applicationThis standard specifies the determination of ambient air chlorine, carbon monoxide, hydrogen sulfide, hydrogen chloride, hydrogen cyanide, phosgene, hydrogen fluoride, ammonia, Formaldehyde, styrene, arsine, ozone, sulfur dioxide, nitrogen oxides, benzene and toluene, and other 16 kinds of harmful gases than the long detection tube method. This standard is qualitative and semi-quantitative method for the ambient air chlorine, carbon monoxide, hydrogen sulfide, hydrogen chloride, hydrogen cyanide, phosgene, Hydrogen fluoride, ammonia, formaldehyde, styrene, arsine, ozone, sulfur dioxide, nitrogen oxides, benzene and toluene and other harmful gases on-site emergency Monitoring, and screening, census and other preliminary investigations. The common measurement range of the target is shown in Appendix A.2 Normative referencesThis standard references the following documents in the terms. For undated references, the effective version applies to this standard. GB/T 7230 gas detection tube device HJ 589 emergency environmental monitoring technical specifications3 method principleThe toxic and harmful gases in the ambient air enter the test tube, where the target and chemical reagents in the test tube (usually called indicator powder) The reaction produces a color change, within a certain concentration range, the discoloration length is proportional to the target concentration. The method of measuring the target is shown in Appendix A.4 Interference and elimination4.1 When the same or similar chemical substances coexist, these substances react with the chemical reagents in the test tube at the same time, resulting in a high result. Substance and test tube in the chemical reagents react, and the reaction speed faster than the target, for example, the chemical oxidation, so that the target can not be detected Or the result is low. The coexisting material first reacts with the chemical reagent in the test tube, and the reactant produced reacts with the target to show the same The reaction of different colors; the target and the test tube in the chemical reagents react, and the reactants and coexisting substances react to make the color darker, Transform or fade, resulting in inaccurate results. 4.2 Humidity interference determination, the tube should be added before the test tube to eliminate interference. Temperature interference determination, should be in accordance with the test tube manual In the temperature calibration coefficient given calibration. Coexist easily oxidized substances interfere with the determination, the tube should be added before the test tube to eliminate the oxidation Interference, other interfering substances can be removed through the filter tube (layer). Refer to Appendix A for the interference and elimination of the target. 25 apparatus and equipment 5.1 Sampling device 5.1.1 test tube Test tube sensitivity, accuracy, color interface and other properties in line with the provisions of GB/T 7230 and requirements. Than the long tube by the glass tube, indicating powder, tick marks and isolation layer composition, the structure shown in Figure 1. 5.1.2 Sampler And supporting the use of test tubes manual or automatic sampling device, divided into injection, vacuum and capsule sampling and so on. Sampler should Sampling end point indicating device, the air tightness and sampling volume error should be consistent with GB/T 7230. 5.1.3 Pretreatment tube Drying tube, oxidation tube and filter tube (layer) and so on. 5.2 air bag Volume of not less than 3L, lining material should be used on the measured object of inert material. 5.3 glass syringe The volume is 100 ml, which is used when the field is not suitable for direct measurement or needs dilution of the sample.6 Preparation before sampling6.1 point layout According to the HJ 589 point layout. 6.2 test tube inspection Test tube before use, you should check the validity period, and the appearance of inspection and found that over the validity of a broken pipe, drug loose, Discoloration or tick marks and other phenomena, shall not be used. 6.3 Sampler inspection The air inlet connected to the sampler and the test tube can not be cracked or deformed and must be tightly connected with the test tube. Before sampling, check the sample Air tightness of the device, blocked the air inlet by hand, start the sampler, should feel obvious resistance. 1-separator 2-indicator powder 3 scale line 4 glass tube Figure 1 than the length of the test tube structure diagram 36.4 Air bag inspection Airtight bag should be checked before use.7 Sample collection and determination7.1 Sampling device connection According to the scene to choose the right test tube and supporting pretreatment tube (if necessary), cut off the test tube and supporting the pretreatment tube ends Seal, and the sampler connected. Sampling device connection diagram shown in Figure 2 and Figure 3. 7.2 direct measurement 7.2.1 set the sampler suction flow and extraction time, with the sampling device to measure the gas to be measured to observe the detection tube discoloration Conditions, to achieve the required gas production volume and reaction time to stop the measurement, the discoloration part of the indicated scale, read the data for two consecutive measurements. Note 1. The color of the discolored portion may change over time, fade or scatter, and the sample should be read immediately after collection. Reading, when seized Tube color change part of the tidy section, the discoloration of the interface and the place where the discoloration is the measured value of the gas concentration of the target object; when the discoloration part of the cross section Inclined or inclined, convex or concave, it should be discolored part of the scale position where the highest and lowest values were averaged. Note 2. If the sample concentration exceeds or falls below the detection range of the detection tube, and there is no detection tube in line with the scope of the measurement can be changed by changing the sampling volume Mode determination, this time should pay attention to the detection range of the test tube to expand the concentration requirements. 7.2.2 When the test tube gives the indication unit is mass concentration, the monitoring results need to be converted into the standard conditions of mass concentration, sample determination Simultaneously, the ambient temperature, humidity (when necessary) and atmospheric pressure of the monitoring site need to be measured simultaneously. 7.3 Indirect determination When the field environment is not suitable for direct determination, collect it with a glass syringe (5.3) and transfer the sample to an air bag (5.2) gas 1- pretreatment tube (connected when needed); 2-detection tube; 3-sampler. Figure 3 Sampling device connection diagram (for vacuum or capsule sampler) 1-sampler; 2-pretreatment tube (connected when needed); 3-test tube. Figure 2 sampling device connection diagram (for injection sampler) gas 4 environment for the determination of the same way with 7.2. Air bags used before the first flush with the scene gas 3 to 5 times. When the target concentration is too high, over Test tube measuring range, but also can use glass syringes and gas collection bags, with nitrogen or relatively clean ambient air after the sample was diluted and measured.8 results calculated and said8.1 Calculation Results 8.1.1 When the test tube reading volume concentration, according to the formula (1) converted to the standard state of mass concentration. 4.22 x (1) Where. ρ - standard state of the measured mass concentration of the target, mg/m3; x - Measured volume concentration of the test object (readings indicated on the colorimetric section of the test tube), μmol/mol; M - the molecular weight of the measured target, g/mol; 22.4 - Molar volume of gas under standard conditions, L/mol. 8.1.2 When the test tube readings for the mass concentration, according to the formula (2) converted into the standard state of mass concentration. '273 101325 = k CF 2 (2) Where. ρ - standard state of the measured mass concentration of the target, mg/m3; ρ '- the measured concentration of the target substance (the reading indicated by the color change on the tube), mg/m3; k - (test tube manual) Temperature and humidity correction factor table on the measured point of the ambient temperature and relative humidity correction Coefficient, k = 1 without correction factor; CF - calibration factor. Determine the system according to the ratio of the standard gas recovery volume to the actual gas recovery volume number. For example, the test tube in the 0.05 mg/m3 ~ 30 mg/m3 measurement range of the standard gas volume of 100 ml, the actual Gas production volume is.200 ml, CF (calibration factor) = 0.5; t - the ambient temperature at the point of measurement, in ° C; P - atmospheric pressure at point of measurement, Pa. 8.2 results indicated The result of the determination is the average of the results of two consecutive measurements, retaining a maximum of 3 significant digits.9 Quality Assurance and Quality ControlAccording to the scene, select the appropriate range of test tube. Disposal of waste Abandoned test tube should be collected, sent to a qualified unit for disposal. 11 Precautions 11.1 test tube should be stored according to the method specified in the instructions, should be verified before use, and to ensure that the use of the period of validity. Use should note The meaning of color changes, the color change should be clear, indicating that the discoloration part of the discoloration part of the interface between the longitudinal along the wall along the shortest and shortest The difference between the end lengths does not exceed 20% of the average of the two. 11.2 Test tube discoloration length and the sampling speed, the measurement should be strictly in accordance with the instructions of the test tube requirements.Appendix A(Informative) Common measurement range, method principle, interference and elimination, and precautions The main gas detection tube common measurement range, method principle, interference and elimination, and precautions for reference. A.1 common measurement range The common measurement range of the target is shown in Table A.1. Table A.1 target common determination range No. Target Common Range (mg/m3) No. Target Common Range (mg/m3) 1 chlorine 0.06 ~ 3.2 × 103 9 Formaldehyde 0.02 ~ 8.6 × 103 2 Carbon monoxide 0.5 to 6.3 × 10 3 10 Styrene 4.7 to 7.0 × 10 3 3 Hydrogen sulfide 0.2 ~ 6.1 × 104 11 Arsine 0.02 ~ 350 4 Hydrogen chloride 0.08 ~ 8.2 × 103 12 Ozone 0.05 ~ 2.1 × 103 5 Hydrogen cyanide 0.2 ~ 2.9 × 103 13 Sulfur dioxide 0.1 ~ 2.3 × 104 6 phosgene 0.2 to 330 14 nitrogen oxides 0.08 to 5.1 × 103 7 Hydrogen fluoride 0.2-89 15 Benzene 0.05-1.5x103 8 ammonia 0.05 ~ 1.0 × 103 16 toluene 0.05 ~ 1.2 × 104 A.2 Methodology, interference and elimination, and precautions A.2.1 chlorine A.2.1.1 Methodology Ambient air into the chlorine detection tube, chlorine will be adsorbed on silica gel o-toluidine oxidation, the indicator powder color from white to yellow Color, within a certain range, discoloration length and chlorine concentration is proportional to. The reaction is as follows. Cl2 C14H16N2 → C14H14N2Cl2 A.2.1.2 Interference and elimination Halogen, ammonia, hydrogen chloride, nitric oxide, nitrogen dioxide, chlorine dioxide and chloramines interfere with the determination. A.2.1.3 Precautions Chlorine gas detection tube is generally used at a temperature of 0 ℃ ~ 40 ℃ and humidity ≤ 90%. A.2.2 Carbon monoxide A.2.2.1 Methodology Ambient air into the carbon monoxide detection tube, carbon monoxide in fuming sulfuric acid role, the adsorbed on the silica gel potassium iodate reduction, precipitation Iodine, so that the indicator powder color from white to brown, within a certain range, the discoloration length is proportional to the concentration of carbon monoxide. The reaction is as follows. CO KIO3 H2SO4 → I2 7A.2.2.2 Interference and elimination Propane, butane, hexane, ethylene, aromatic hydrocarbons, etc. co-exist on the determination of the impact. A.2.2.3 Precautions Carbon monoxide detection tube is generally used at a temperature of 15 ℃ ~ 30 ℃. A.2.3 Hydrogen sulfide A.2.3.1 Methodology Ambient air into the hydrogen sulfide test tube, hydrogen sulfide and lead acetate adsorption on the reaction of silica gel, resulting in a green color of lead sulfide column, in a Within a certain range, the discoloration length is proportional to the concentration of hydrogen sulfide gas. The reaction is as follows. H2S (CH3COO) 2 Pb → PbS ↓ A.2.3.2 Interference and elimination Sulfur dioxide, arsine, hydrogen bromide, nitrogen oxides and other interference on the determination. A.2.3.3 Precautions Hydrogen sulfide detection tube is generally used at a temperature of 0 ℃ ~ 40 ℃. A.2.4 Hydrogen chloride A.2.4.1 Methodology Ambient air into the hydrogen chloride detection tube, hydrogen chloride and alkali adsorbed on the silica gel and the reaction occurs, so that indicator powder discoloration, in a certain range Inside, the discoloration length is proportional to the concentration of hydrogen chloride gas. The reaction is as follows. HCl base → salt H2O A.2.4.2 Interference and elimination When the acid gas coexists, the measurement result is high. A.2.4.3 Precautions Hydrogen chloride detection tube is generally used at a temperature of 0 ℃ ~ 40 ℃ and humidity of 5% to 70%. A.2.5 Hydrogen cyanide A.2.5.1 Methodology A.2.5.1.1 Ambient air into the hydrogen cyanide test tube, hydrogen cyanide and mercury in the adsorption of mercury on the reaction of mercuric chloride to generate hydrogen chloride, Change the pH of the medium, the indicator powder discoloration, within a certain range, discoloration length and concentration of hydrogen cyanide gas is proportional to. The reaction is as follows. 2HCN HgCl2 → Hg (CN) 2 2HCl A.2.5.1.2 Ambient air into the hydrogen cyanide test tube, hydrogen cyanide with diphenylamine and copper acetate solution treated indicator powder reaction, the fingers Powder color from white to blue, within a certain range, discoloration length and concentration of hydrogen cyanide gas is proportional to. A.2.5.2 Interference and elimination 8 ammonia has negative interference with the measurement results. Hydrogen chloride, nitric acid, sulfur dioxide, nitrogen dioxide, hydrogen fluoride and hydrogen sulfide and other acid gases on the test The result is positive interference. A.2.5.3 Precautions Hydrogen cyanide test tube is generally used at a temperature of 0 ℃ ~ 40 ℃ and humidity of 5% to 95%. A.2.6 Phosgene A.2.6.1 Methodology Ambient air into the phosgene detection tube, phosgene and adsorbed on silica gel on the reaction of diamino benzaldehyde and diphenylamine, so that the color indicator powder From white to yellow, within a certain range, discoloration length and phosgene concentration is proportional to. The reaction is as follows. COCl2 (CH3) 2NC6H4CHO → (CH3) 2NC6H4CHCl2 (CH3) 2NC6H4CHCl2 (C6H5) 2NH → yellow product A.2.6.2 Interference and elimination Chlorine, hydrogen chloride, nitrogen dioxide, carbonyl bromide and acetyl chloride, such as the co-existence of the measurement results. A.2.6.3 Precautions Phosgene detection tube is generally used at a temperature of 0 ℃ ~ 40 ℃, not affected by humidity. A.2.7 Hydrogen fluoride A.2.7.1 Methodology Ambient air into the hydrogen fluoride detection tube, hydrogen fluoride and adsorption on the base of silica gel and the reaction occurs, so that indicator powder color, in a certain range Inside, the discoloration length is proportional to the concentration of hydrogen fluoride. The reaction is as follows. HF base → salt H2O A.2.7.2 Interference and elimination When the acid gas coexists, the measurement result is high. A.2.7.3 Precautions Hydrogen fluoride test tube is generally used at a temperature of 0 ℃ ~ 40 ℃, humidity 5% ~ 70%. A.2.8 Ammonia A.2.8.1 Methodology Ambient air into the ammonia test tube, ammonia and adsorbed on the phosphoric acid on the silica gel and the reaction occurs, so that indicator powder color, in a certain range Within, discoloration length and ammonia concentration is proportional to. The reaction is as follows. NH3 H3PO4 → (NH4) 2HPO4 A.2.8.2 Interference and elimination 9 Hydrogen sulphide, sulfur dioxide, nitric oxide, amines, hydrazine in the presence of ammonia on the determination of positive interference. Ammonia by humidity interference, measured Timing tube should......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of HJ 871-2017_English be delivered?Answer: Upon your order, we will start to translate HJ 871-2017_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 871-2017_English with my colleagues?Answer: Yes. The purchased PDF of HJ 871-2017_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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