GB/T 11446.8-2013 PDF EnglishUS$120.00 · In stock · Download in 9 seconds
GB/T 11446.8-2013: Test method for total organic carbon in electronic grade water Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 11446.8: Historical versions
Similar standardsGB/T 11446.8-2013: Test method for total organic carbon in electronic grade water---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/GBT11446.8-2013GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 31-030 L 90 Replacing GB/T 11446.8-1997 Test method for total organic carbon in electronic grade water Issued on. DECEMBER 31, 2013 Implemented on. AUGUST 15, 2014 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of PRC; Standardization Administration of PRC. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 Principles of the method... 6 5 Disturbing factors... 6 6 Reagents... 7 7 Measuring instruments... 7 8 Operation procedures... 8 9 Precision and accuracy... 8 10 Report... 8ForewordThe expected structure of GB/T 11446 is as follows. - GB/T 11446.1 Electronic grade water; - GB/T 11446.2 (To be determined); - GB/T 11446.3 Generic rules for test methods of electronic grade water; - GB/T 11446.4 Test method for resistivity of electronic grade water; - GB/T 11446.5 Test method for measuring trace metals in electronic grade water by atomic absorption spectrophotometry; - GB/T 11446.6 Test method for SiO2 in electronic grade water by spectrophotometer; - GB/T 11446.7 Test method for trace anion in electronic grade water by ion chromatography; - GB/T 11446.8 Test method for total organic carbon in electronic grade water; - GB/T 11446.9 Test method for particles in electronic grade water by instrument; - GB/T 11446.10 Test method for total bacterial count in electronic grade water by membrane filters. This part is Part 8 of GB/T 11446. This part was drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 11446.8-1997 "Test method for total organic carbon in electronic grade water". Compared with GB/T 11446.8-1997, this Part mainly has the following changes. - ADD "3 Terms and definitions" (see Chapter 3); - ADD "5 Disturbing factors" (see Chapter 5); - DELETE "9 Precautions" (see Chapter 9 of the 1997 edition). This Part was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This Part shall under the jurisdiction of China Electronics Standardization Institute. Drafting organizations of this Part. Special Material Quality Supervision and Inspection Center of the Ministry of Information Industry, Institute of Semiconductors of Chinese Academy of Sciences, China Electronics Standardization Institute, 46th Research Institute of China Electronics Technology Group Corporation. The main drafters of this Part. Wang Yi, Chu Lianqing, He Xiukun, Duan Shuguang, Ti Liuwang, Liu Yun. This standard replaces the standard previously issued as follows. - GB/T 11446.8-1989, GB/T 11446.8-1997. Test method for total organic carbon in electronic grade water1 ScopeThis Part of GB/T 11446 specifies the test method for total organic carbon, in electronic grade water. This Part applies to the determination of total organic carbon, in electronic grade water.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 603-2002 Chemical reagent – Preparations of reagent solution for use in test method GB/T 11446.1-2013 Electronic grade water3 Terms and definitionsThe terms and definitions as defined in GB/T 11446.3-2013, as well as the following terms and definitions, apply to this document. 3.1 Total organic carbon; TOC The total amount of carbon in the water, in the form of various organic matter. It includes organic matter, that is easily oxidized by general strong oxidants AND organic matter, which needs to be oxidized by special methods.4 Principles of the methodAdd phosphoric acid to the water sample. Control the pH to be not greater than 2.Then the inorganic carbonate will be decomposed into carbon dioxide.5 Disturbing factors5.1 The solution is easy to be contaminated, during storage. The standard solution shall be prepared before use. During use, it is better to cover with nitrogen. 5.3 Whether the laboratory air is purified or not, has a greater impact on the analysis results. The measurement shall be performed, in a grade 100 clean room.6 Reagents6.1 Blank water. EW-I electronic grade water, which is specified in GB/T 11446.1-2013. 6.2 Sodium persulfate (or potassium persulfate). High purity. 6.3 Phosphoric acid (85%). Excellent pure grade. 6.5 Organic carbon standard solution. Weigh 1.0000 g of acetic acid or 0.8500 g of potassium hydrogen phthalate. Dissolve it in water, which has no carbon dioxide AND is removed of organics. Make the volume reach to 1 L. This solution contains 400 mg/L carbon.7 Measuring instruments7.1 Total organic carbon tester, including carbon dioxide gas detector and recorder. 7.2 Construct a device, for preparing carbon dioxide-free water, in accordance with the provisions of GB/T 603-2002. 7.3 Sample injector. 5 μL, 10 μL, 50 μL, etc.8 Operation procedures8.1 Selection of test conditions After the instrument is turned on and warmed up for 30 minutes, select the working parameters, to make the instrument in a stable working state. 8.2 Drawing of working curve Respectively take the standard solution of inorganic carbon and organic carbon. Prepare a mixed standard solution of 0.05 mg/L ~ 1.00 mg/L inorganic carbon and organic carbon. 8.3 Water sample analysis Analyze the water sample, according to the steps specified in 8.2.According to the measured peak height, check the content of inorganic carbon and total carbon, in the water sample, from the corresponding working curve.9 Precision and accuracyFor more than 10 carbon standard solutions, which have a concentration of 100 μg/L, make determination, respectively. The relative standard deviation is less than 10%; the recovery rate is between 80% and 120%.10 ReportThe test report shall be prepared, according to the format, which is given in GB/T 11446.3-2013. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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