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Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. HJ 700-2014: Water quality. Determination of 65 elements. Inductively coupled plasma-mass spectrometry Status: Valid
Basic dataStandard ID: HJ 700-2014 (HJ700-2014)Description (Translated English): Water quality. Determination of 65 elements. Inductively coupled plasma-mass spectrometry Sector / Industry: Environmental Protection Industry Standard Classification of Chinese Standard: Z16 Word Count Estimation: 26,276 Date of Issue: 5/16/2014 Date of Implementation: 7/1/2014 Quoted Standard: GB/T 6682; HJ/T 91; HJ/T 164; HJ 493; HJ 494; HJ 677; HJ 678 Regulation (derived from): Ministry of Environmental Protection Notice No. 34 of 2014 Issuing agency(ies): Ministry of Ecology and Environment Summary: This Standard specifies the determination of water and 65 kinds of elements by inductively coupled plasma mass spectrometry. This Standard applies to surface water, groundwater, sewage, low concentrations of industrial wastewater silver, aluminum, arsenic HJ 700-2014: Water quality. Determination of 65 elements. Inductively coupled plasma-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. Water quality.Determination of 65 elements.Inductively coupled plasma-mass spectrometry National Environmental Protection Standard of the People's Republic Determination of 65 elements of water quality Inductively coupled plasma mass spectrometry Water quality-Determination of 65 elements- Inductively coupled plasma-mass spectrometry Published on.2014-05-16 2014-07-01 implementation Ministry of Environmental Protection released ContentForeword..I 1 Scope..1 2 Normative references..1 3 Terms and Definitions 1 4 method principle..1 5 interference and elimination 2 6 Reagents and materials 2 7 Instruments and equipment 3 8 sample 3 9 Analysis steps..4 10 Results calculation and representation..5 11 Precision and Accuracy..5 12 Quality Assurance and Quality Control.6 13 Waste treatment 7 14 Notes. 7 Appendix A (normative appendix) Method detection limit and lower limit of measurement 8 Appendix B (informative) Interference, interference correction equation for polyatomic ions, recommended mixed standard stock solution grouping And preservation medium, analyte quality and internal standard..9 Appendix C (informative) The precision and accuracy of the method..12ForewordTo implement the Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China on Water Pollution Prevention and Control, to protect the environment, This standard is formulated to ensure human health and standardize the monitoring methods for 65 elements in water. This standard specifies inductively coupled plasma mass spectrometry for the determination of 65 elements in water. This standard is the first release. Appendix A of this standard is a normative appendix, and Appendix B to Appendix C are informative appendices. This standard was formulated by the Science and Technology Standards Department of the Ministry of Environmental Protection. This standard is mainly drafted by. Jiangsu Environmental Monitoring Center and Suzhou Environmental Monitoring Center Station. The units that participate in the verification of this standard are. Nanjing Environmental Monitoring Center Station, Wuxi Environmental Monitoring Center Station, Shaoxing City Ring Environmental Monitoring Center Station, Ningbo Environmental Monitoring Center, Suzhou Water Supply Company Water Quality Testing Center, Maanshan Environmental Monitoring Heart station. This standard was approved by the Ministry of Environmental Protection on May 16,.2014. This standard has been implemented since July 1,.2014. This standard is explained by the Ministry of Environmental Protection. Water quality - Determination of 65 elements - Inductively coupled plasma mass spectrometry WARNING - Avoid direct contact with the skin when preparing and measuring standard solutions for highly toxic carcinogens such as barium, arsenic, and cadmium. Hydrochloric acid, nitric acid They are all highly chemically corrosive and irritating. They should be worn with protective equipment according to the requirements and operated in a fume hood to avoid acid mist absorption. Into the respiratory tract and contact with skin and clothing.1 Scope of applicationThis standard specifies inductively coupled plasma mass spectrometry for the determination of 65 elements in water. This standard applies to surface water, groundwater, domestic sewage, low concentration industrial wastewater, silver, aluminum, arsenic, gold, boron, antimony, 铍, 铋, calcium, cadmium, strontium, cobalt, chromium, bismuth, copper, bismuth, antimony, bismuth, iron, gallium, antimony, bismuth, antimony, bismuth, indium, antimony, Potassium, strontium, lithium, strontium, magnesium, manganese, molybdenum, sodium, strontium, strontium, nickel, phosphorus, lead, palladium, iridium, platinum, rhodium, iridium, osmium, iridium, Determination of antimony, bismuth, selenium, tellurium, tin, antimony, bismuth, antimony, bismuth, titanium, antimony, bismuth, uranium, vanadium, tungsten, antimony, bismuth, zinc and zirconium. The detection limit of each element of the method is 0.02 μg/L to 19.6 μg/L, and the lower limit of determination is 0.08 μg/L to 78.4 μg/L. each See Appendix A for the method detection limits for the elements.2 Normative referencesThe contents of this standard refer to the following documents or their terms. For undated references, the valid version is appropriate. Used in this standard. GB/T 6682 Analytical laboratory water specifications and test methods HJ/T 91 Surface Water and Wastewater Monitoring Technical Specifications HJ/T 164 Technical Specifications for Groundwater Environmental Monitoring HJ 493 Technical Regulations for Preservation and Management of Water Quality Samples HJ 677 Water quality metal total digestion nitric acid digestion method HJ 678 Water quality metal total digestion microwave digestion method3 Terms and definitionsThe following terms and definitions apply to this standard. 3.1 soluble elements Refers to the element content measured after filtration through a 0.45 μm filter on a sample that has not been acidified. 3.2 Total amount of elements Refers to the unmeasured sample, the element content measured after digestion.4 Principle of the methodAfter pretreatment, the water sample is detected by inductively coupled plasma mass spectrometry according to the mass spectrum or characteristic ion of the element. Qualitative, internal standard method quantitative. The sample is carried into the atomization system by the carrier gas for atomization, and then enters the plasma as an aerosol. The axial channel is fully vaporized, dissociated, atomized and ionized in high temperature and inert gas, and converted into charged positive The ions enter the mass spectrometer through the ion collection system, and the mass spectrometer separates and determines according to the mass-to-charge ratio of the ions, that is, the mass of the elements. Sexual and quantitative analysis. Within a certain concentration range, the signal response value corresponding to the element mass number is proportional to its concentration.5 interference and elimination5.1 Mass Spectral Interference Mass spectrometry interference mainly includes polyatomic ion interference, isobaric interference, oxide and double charge interference. Multiple original Sub-ion interference is the most important source of interference for ICP-MS, and can be used for interference correction equations, instrument optimization, and collision reactions. Pool technology to solve, common polyatomic ion interference see Appendix Table B.1. Isobaric interference can use interference correction The equation is corrected, or the sample is chemically separated before analysis, and the main interference correction equation is attached. Record B.2. Oxide interference and double charge interference can reduce the effects by adjusting instrument parameters. 5.2 Non-mass speculative interference Non-mass spectroscopic interference mainly includes matrix suppression interference, space charge effect interference, physical effect interference and the like. Non-mass type The degree of interference is related to the nature of the sample matrix and can be eliminated by internal standard method, instrument condition optimization or standard addition method.6 reagents and materialsReagents used in this standard are analyzed using high-grade purification reagents that meet national standards, unless otherwise stated. 6.1 Experimental water. resistivity ≥18MΩ·cm, and other indicators meet the first-class standard in GB/T 6682. 6.2 Nitric acid. ρ(HNO3)=1.42 g/mL, superior grade or superior grade pure, if necessary, purified. 6.3 Hydrochloric acid. ρ(HCl)=1.19 g/mL, superior grade or superior grade pure, if necessary, purified. 6.4 Nitric acid solution. 1 99. 6.5 Nitric acid solution. 2 98. 6.6 Nitric acid solution. 1 1. 6.7 Hydrochloric acid solution. 1 1. 6.8 standard solution 6.8.1 Single element standard stock solution. ρ = 1.00 mg/mL. Available in spectrally pure metals (purity greater than 99.99%) or other standard materials to a concentration of 1.00 mg/mL Stock solution, select the appropriate medium according to the nature of each element (see Appendix Table B.3 Mixed Standard Stock Solution Group Recommendation Save media). A certified standard solution can also be purchased. 6.8.2 Mixed standard stock solution Can purchase certified mixed standard solution, depending on the interference between elements, the nature of the standard solution and the test The content of the elements, the elements are grouped into a mixed standard stock solution (see Appendix B.3 recommended mixed standard stock solution) Liquid grouping and storage medium). Note 1. Standard stock solutions for all elements should be stored in sealed polyethylene or polypropylene bottles after preparation. Note 2. The solution containing the element Ag needs to be stored in the dark. 6.8.3 Mixed standard use solution Can purchase certified mixed standard solution, depending on the interference between elements, the nature of the standard solution and the test The content of the element, the elemental standard stock solution (6.8.1 or 6.8.2) is diluted with a nitric acid solution (6.5), and the elements are grouped and formulated. Into a mixed standard use solution, potassium, sodium, calcium, magnesium stock solution is the use of its solution, the concentration is 100 mg/L; the rest The element mixing solution solution concentration was 1 mg/L. 6.9 Internal standard storage solution. ρ=100μg/L. 6Li, 45Sc, 74Ge, 89Y, 103Rh, 115In, 185Re, 209Bi should be selected as the internal standard elements (the selection of internal standard elements) Refer to Appendix Table B.4) for details. The certified standard solution can be purchased directly and diluted to 100 μg/L with a nitric acid solution (6.4). 6.10 Internal standard use solution The internal standard stock solution (6.9) was diluted with a nitric acid solution (6.4) to prepare an internal standard standard use solution. Due to different instruments Different internal diameter peristaltic pump tubes are added to the internal standard online, resulting in different concentrations of internal standard into the sample, so the internal concentration of the liquid is used. The concentration of the internal standard element in the sample solution should be considered to be about 5 μg/L to 50 μg/L. 6.11 Mass spectrometer tuning solution. ρ = 10 μg/L. A tuning solution containing Li, Y, Be, Mg, Co, In, Tl, Pb, and Bi elements as a mass spectrometer should be used. Directly Purchase a certified standard solution and dilute to 10 μg/L with a nitric acid solution (6.4). 6.12 Argon. The purity is not less than 99.99%.7 Instruments and equipment7.1 Inductively coupled plasma mass spectrometer and its corresponding equipment. The working environment of the instrument and the requirements for the power supply are based on the instrument. The instructions are prescribed. Instrument scanning range. 5-250 amu, resolution. 10% peak height corresponding to the peak width should be better than 1 amu. 7.2 Temperature control electric heating plate. 7.3 Microwave digestion instrument. 7.4 Filter device, 0.45 μm pore water microporous membrane. 7.5 Teflon beaker. 250 mL. 7.6 Polyethylene volumetric flask. 50mL, 100mL. 7.7 Polypropylene or Teflon bottle. 100mL. 7.8 Common instruments and equipment used in general laboratories.8 samples8.1 Sample collection Sample collection is performed in accordance with the relevant provisions of HJ/T 91 and HJ/T 164. Soluble element samples and total element samples are divided. Do not collect. 8.2 Preservation of samples Soluble element samples were collected immediately after collection with a 0.45 μm filter (7.4), and the initial filtrate was discarded. The filtrate is cleaned of the sampling bottle, and the required volume of the filtrate is collected in a sampling bottle, and an appropriate amount of nitric acid (6.6) is added to adjust the acidity to pH< 2. The preservation of the total amount of elements is carried out in accordance with the relevant regulations of HJ 493. After the sample is collected, an appropriate amount of nitric acid (6.6) is added. Adjust the acidity to pH < 2. 8.3 Preparation of samples 8.3.1 Soluble elements See 8.2 for sample handling methods. 8.3.2 Total amount of elements 8.3.2.1 Electric heating plate digestion method Accurately measure (100.0±1.0) mL of the shaken sample (8.2) in a 250 mL Teflon beaker (7.5) The actual situation of the water sample, the sampling amount can be appropriately reduced, but need to pay attention to the calculation of the dilution factor), add 2mL nitric acid solution (6.6) And 1.0mL hydrochloric acid solution (6.7) in the above beaker, placed on a hot plate to heat digestion, the heating temperature should not be higher than 85 ° C (See Note 3 for details). When dissolving, the beaker should be covered with a watch glass or other measures should be taken to ensure that the sample is not affected by the ring around the fume hood. Environmental pollution. Continue heating to keep the solution from boiling until the sample evaporates to about 20 mL. Place the watch on the beaker Reduce excessive evaporation and maintain a slight continuous reflux for 30 min. After the sample has cooled, rinse the beaker with deionized water for at least three Once, pour the rinse into the volumetric flask and ensure that the digest is transferred to a 50mL volumetric flask (7.6) and deionized water. Cap, cover, shake and store. If some insoluble matter is present in the digested solution, it may be left to stand overnight or centrifuged to obtain a clear liquid. If left After the heart or after standing overnight, there is still suspended matter, which can be removed by filtration, but the possible contamination during the filtration process should be avoided. ) 8.3.2.2 Microwave digestion Accurately measure 45.0 mL of the shaken sample (8.2) in a digestion tank, add 4.0 mL of concentrated nitric acid (6.2) and 1.0 mL. Concentrated hydrochloric acid (6.3) (the amount of sample and the amount of acid added can be reduced according to the volume of the microwave digestion tank), at a temperature of 170 ° C Microwave digestion for 10 minutes. After the digestion is completed, after cooling to room temperature, the digestion solution is transferred to a 100 mL volumetric flask (7.6). Dilute to the mark with deionized water, shake well, and test. The sample can also be moderately concentrated and brought to a 50 mL volumetric flask (7.6). Note 3. When using the hot plate digestion method, the correct heating method is to place the beaker in the middle of the electric heating plate and adjust the temperature of the electric heating plate so that the temperature of the electric heating plate is adjusted. The temperature of the beaker containing the water sample and the uncapped beaker is not higher than 85 °C. If the beaker is covered with a watch glass, the water temperature can rise to about 95 °C. Note 4. When the target elements are silver, aluminum, arsenic, antimony, bismuth, calcium, cadmium, cobalt, chromium, copper, iron, potassium, magnesium, manganese, molybdenum, nickel, lead, antimony, For the total amount of vanadium and zinc, the sample may be digested with HJ 677 or HJ 678; the remaining elements are carried out with reference to the method. Sample preparation After completion, the analysis should be carried out as soon as possible. Note 5. For samples with higher organic content, add appropriate amount of hydrogen peroxide as appropriate. 8.4 Preparation of laboratory blank samples The test water was used instead of the sample, and a laboratory blank sample was prepared according to the procedure of 8.3.9 Analysis steps9.1 Instrument Commissioning 9.1.1 Reference operating conditions of the instrument Different types of instruments have different optimal working conditions. Standard mode, collision/reaction cell mode, etc. should be used according to the instrument. Instructions for operation. 9.1.2 Instrument Tuning After igniting the plasma, the instrument needs to be preheated for 30 minutes. First use the mass spectrometer to tune the solution (6.11) to the instrument Sensitivity, oxide and double charge are tuned, under the condition that the sensitivity, oxide and double charge of the instrument meet the requirements. The relative standard deviation of the signal intensity of the elements contained in the tuning solution is ≤ 5%. Then proceed within the mass range covering the elements to be tested Quality correction and resolution check, such as the difference between the quality correction result and the true value exceeds ±0.1 amu or the resolution of the tuned element signal The ratio of the peak width corresponding to the peak height of 10% exceeds 0.6-0.8 amu, and the mass spectrometer should be used according to the requirements of the instrument manual. Make corrections. 9.2 Drawing of the calibration curve A series of standard solutions of the elements to be tested are sequentially prepared, and the concentration range of the calibration curve can be adjusted according to the measurement needs. In capacity Take a certain volume of the standard use solution (6.8.3) in the bottle, and prepare a series of standard curve using the nitric acid solution (6.4). As follows. aluminum, boron, antimony, cobalt, copper, iron, manganese, titanium, zinc concentrations of 0μg/L, 10.0μg/L, 50.0μg/L, 100 μg/L, 200 μg/L, 300 μg/L, 400 μg/L, 500 μg/L; silver, arsenic, gold, antimony, bismuth, cadmium, antimony, chromium, antimony, bismuth, antimony, Bismuth, gallium, germanium, antimony, bismuth, antimony, indium, antimony, bismuth, antimony, molybdenum, antimony, bismuth, nickel, phosphorus, lead, palladium, rhodium, platinum, rhodium, 浓度, 铑, 钌, 锑, 钪, selenium, bismuth, tin, antimony, bismuth, antimony, bismuth, antimony, uranium, vanadium, tungsten, antimony, bismuth, zirconium 0μg/L, 0.5μg/L, 1.0μg/L, 5.0μg/L, 10.0μg/L, 20.0 μg/L, 40.0 μg/L, 50.0μg/L; potassium, sodium, Calcium and magnesium concentrations were 0 mg/L, 5.0 mg/L, 10.0 mg/L, 20.0 mg/L, 40.0 mg/L, 60.0 mg/L, 80.0 mg/L, 100mg/L; lithium and strontium concentrations are 0 mg/L, 0.1 mg/L, 0.5 mg/L, 1.0 mg/L, 2.0 mg/L, 3.00 mg/L, 4.0 mg/L, Standard series of 5.0mg/L. The internal standard element standard solution (6.10) can be directly added to the working solution or in the sample. It is automatically added by a peristaltic pump before atomization. The concentration of the internal standard should be much higher than the concentration of the internal standard element contained in the sample itself. The internal standard elements and concentration range are given in 6.10. The standard solution is determined by ICP-MS, and the ratio of the sample signal to the internal standard signal is taken as the abscissa of the standard solution concentration. A calibration curve is established on the ordinate. The slope was determined by linear regression analysis method for sample content calculation. 9.4 Determination 9.4.1 Determination of samples Before each sample is measured, flush the system with nitric acid solution (6.5) until the signal is at a minimum, and the signal to be analyzed is stab......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of HJ 700-2014_English be delivered?Answer: Upon your order, we will start to translate HJ 700-2014_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of HJ 700-2014_English with my colleagues?Answer: Yes. The purchased PDF of HJ 700-2014_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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