GB/T 23942-2009 PDF EnglishUS$145.00 · In stock · Download in 9 seconds
GB/T 23942-2009: Chemical reagent - General rules for inductively coupled plasma atomic emission spectrometry Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 23942-2009: Chemical reagent - General rules for inductively coupled plasma atomic emission spectrometry---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/GBT23942-2009 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.040.30 G 60 Chemical reagent - General rules for inductively coupled plasma atomic emission spectrometry Issued on. JUNE 02, 2009 Implemented on. FEBRUARY 01, 2010 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Methodology... 6 5 Reagents... 7 6 Instruments... 7 7 Determination... 7 8 Recovery rate... 10 9 Safety considerations... 10 Appendix A (Normative) Quartz sub-boiling distillation device... 11 Appendix B (Normative) Preparation of multi-element group standard solution ... 13 Appendix C (Informative) Test element analysis spectral line wavelength... 14 Appendix D (Normative) Detection limit determination method... 16ForewordAppendix A, Appendix B and Appendix D of this standard are normative appendixes. Appendix C is an informative appendix. This standard was proposed by China Petroleum and Chemical Industry Association. This standard shall be under the jurisdiction of the National Chemical Standardization Technical Committee Chemical Reagents Subcommittee (SAC/TC 63/SC 3). Drafting organizations of this standard. China Institute of Metrology, Beijing Institute of Chemical Reagents. Main drafters of this standard. Shi Naijie, Li Haifeng, Ma Liandi, Han Baoying. Test method for total bacterial count in electronic grade water by membrane filters1 ScopeThis standard specifies the requirements and methods for the determination of metal and non-metallic impurities in chemical reagents by inductively coupled plasma atomic emission spectrometry. This standard applies to the liquid specimen of chemical reagents containing a variety of impurities or the direct sample injection of the sample solution after removal of the substrate which is determined by the inductively coupled plasma atomic emission spectrometry (ICP-AES). This standard does not apply to solid sample injection.2 Normative referencesThe provisions in following documents become the provisions of this standard through reference in this standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this standard; however, parties who reach an agreement based on this standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB/T 602 Chemical reagent – Preparations of standard solutions for impurity (GB/T 602-2002, ISO 6353-1.1982, NEQ) GB/T 4470 Analytical spectroscopic methods - Flame emission, atomic absorption and atomic fluorescence - Vocabulary GB/T 4842 Argon3 Terms and definitionsThe following terms and definitions established by GB/T 4470 apply to this standard. 3.1 High frequency generator A high frequency power source that provides high frequency energy to the coupling coil and plasma. 3.2 Plasma torch A device consisting of three layers of concentric quartz tubes to maintain a stable discharge of inductively coupled plasma (ICP). 3.3 Incident power The net power delivered by the high frequency generator to the coupling coil and the plasma. 3.4 Observation height Select the height of the exposed part of the plasma torch. 3.5 Coolant gas The outermost gas flow of the torch which serves to cool the torch and maintain the plasma.4 MethodologyThe sample solution is atomized by the atomization system to form an aerosol, which is carried into the plasma by the carrier gas, evaporated, atomized, excited and ionized in a high-temperature and inert argon atmosphere.5 Reagents5.1 Hydrochloric acid and nitric acid shall select high-purity reagents or superior pure reagents which is subject to sub-boiling distillation (SEE Appendix A for the quartz sub-boiling distillation apparatus). 5.2 The test water shall meet the level II water specification in GB/T 6682.6 Instruments6.1 General requirements The inductively coupled plasma atomic emission spectrometer shall comply with the provisions of JJG 768. 6.2 Instrument type 6.2.1 Multichannel inductively coupled plasma atomic emission spectrometer. 6.3 Instrument composition The inductively coupled plasma atomic emission spectrometer consists of an injection system, an excitation light source, a dispersion system, a detection system, and a data processing system.7 Determination7.1 Selection of measurement conditions 7.1.1 Analytical spectral lines of the elements under test The wavelength of the analytical line of the element under test is given in Appendix C. 7.1.4 Gas and flow In accordance with the torch and analysis requirements, DETERMINE the gas flow. The argon used shall meet the requirements of GB/T 4842. 7.1.5 Solution extraction rate The extraction rate of the solution is generally (0.5 ~ 2) mL/min. 7.1.6 Analysis time The rinse time and exposure time are determined by the instrument and analysis requirements. 7.2 Elimination of interference 7.2.1 The use of appropriate separation methods and selection of appropriate element spectral lines, observation heights, incident power, and carrier gas flow may limit some of the interference effects in the light source to a certain level. 7.3 Measurement methods 7.3.1 Processing of samples In accordance with the characteristics of the sample and the measurement characteristics of the instrument, the sample matrix may be removed by a separation method such as volatilization, acid digestion, alkali digestion, dry ashing, extraction, ion exchange, precipitation, or directly diluted to prepare a sample solution. 7.3.3 Standard addition method PREPARE test solutions and blank solutions as specified in product standards. MEASURE the same volume of the above test solution, at least four sets. DO not add standard solution in one set, ADD standard solution in proportions respectively into the rest sets, DILUTE it to the specified volume. 7.3.4 Calculation The mass fraction of the elements to be measured is calculated by w, expressed in terms of “%” and calculated in accordance with formula (1).8 Recovery rateThe test element recovery rate shall be controlled at 80% ~ 120%.9 Safety considerations9.1 High-pressure argon cylinders shall be used in accordance with the provisions for the safe operation of high-pressure cylinders. 9.3 Pay attention to safe electricity.Appendix A(Normative) Quartz sub-boiling distillation device A.1 Quartz sub-boiling distillation device SEE Figure A.1. A.2 Precautions A.2.1 The temperature shall be strictly controlled below the boiling point of the acid and the solution must not boil. A.2.2 Distilled liquid flow rate shall be controlled at about 40 mL/h.Appendix B(Normative) Preparation of multi-element group standard solution B.1 Multi-element group standard solution shall use certified multi-element solution standard substance, the other requirements are same as clause 5. B.2 Elements that interfere with each other chemically, produce sediments, and have spectral interferences shall be prepared in groups. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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