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WS/T 107.1-2016: Determination of iodine in urine - Part 1: AS3+-Ce4+ catalytic spectrophotometry
Status: Valid WS/T 107.1: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| WS/T 107.1-2016 | English | 189 |
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Determination of iodine in urine - Part 1: AS3+-Ce4+ catalytic spectrophotometry
| Valid |
WS/T 107.1-2016
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| WS/T 107-2006 | English | 239 |
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Method for determination of iodine in urine by As3+-Ce4+ catalytic spectrophotometry
| Obsolete |
WS/T 107-2006
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| WS/T 107-1999 | English | 239 |
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Method for determination of iodine in urine by As (III)-Ce4+catalytic spectrophotometry
| Obsolete |
WS/T 107-1999
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PDF similar to WS/T 107.1-2016
Standard similar to WS/T 107.1-2016 GBZ 57 GB/T 31989 WS/T 90 WS/T 87 WS/T 107.2 Basic data | Standard ID | WS/T 107.1-2016 (WS/T107.1-2016) | | Description (Translated English) | Determination of iodine in urine - Part 1: AS3+-Ce4+ catalytic spectrophotometry | | Sector / Industry | Health Industry Standard (Recommended) | | Classification of Chinese Standard | C61 | | Classification of International Standard | 11.02 | | Word Count Estimation | 8,889 | | Date of Issue | 2016-04-28 | | Date of Implementation | 2016-10-31 | | Older Standard (superseded by this standard) | WS/T 107-2006 | | Regulation (derived from) | National Guard (2016) on the 3rd | | Issuing agency(ies) | National Health and Family Planning Commission of the People's Republic of China | WS/T 107.1-2016: Determination of iodine in urine - Part 1: AS3+-Ce4+ catalytic spectrophotometry---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 iodine in urine - Part 1. AS3-Ce4 catalytic spectrophotometry
ICS 11.020
C61
People's Republic of China health industry standards
Replacing WS/T 107-2006
Urine - Determination of iodine - Part 1. Cerium arsenide catalysis
Determinationofiodineinurine-Part 1. As3-Ce4 catalytic
2016-04-28 released
2016-10-31 implementation
People's Republic of China National Health and Family Planning Commission released
Foreword
WS/T 107 "Determination of urinary iodine" to be released in part, divided into the following two parts.
--- Part 1. arsenic cerium catalytic spectrophotometry;
--- Part 2. Inductively coupled plasma mass spectrometry.
This section is part 1 of WS/T 107.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This section replaces WS/T 107-2006 "urinary iodine arsenic cerium catalytic spectrophotometry."
This section compared with WS/T 107-2006, the main technical changes are as follows.
--- Modify the use of arsenic acid solution and ceric ammonium sulfate solution concentration, the use of arsenic trioxide reduced to a quarter of the original method;
--- Increased direct sampling digestion determination of 300μg/L ~ 1200μg/L concentration range of urine iodine method steps;
--- Modify 0μg/L ~ 300μg/L concentration range of urine iodine determination method of determination of wavelength;
--- Modify, an increase of method characteristics, quality assurance and control points;
--- Added Appendix A, which increased by 300μg/L ~ 1200μg/L range of urine iodine determination of different temperature response
Inter-table.
This section is drafted. Xiamen City, Fujian Province Center for Disease Control and Prevention, Tianjin Medical University Endocrine Institute, China Disease Prevention and Control
Center for Nutrition and Health, Anhui Provincial Center for Disease Control and Prevention, Shaanxi Provincial Institute of endemic disease prevention and control.
The main drafters of this section. Zhang Yaping, Yan Yuqin, Liu Liejun, Sun Yina, Li Weidong, Wah Kai ceremony, Huang Yanhong, Li Xiuwei, Zhao Lisheng.
This part of the standard replaces the previous editions are.
--- WS/T 107-1999;
--- WS/T 107-2006.
Urine - Determination of iodine - Part 1. Cerium arsenide catalysis
Spectrophotometry
WARNING. It is the responsibility of users of highly toxic arsenic trioxide to take appropriate safety precautions.
1 Scope
WS/T 107 provisions of this part of the urinary iodine arsenic cerium catalytic spectrophotometric determination.
This section applies to the determination of urine total iodine concentration.
2 principle
Using ammonium persulfate solution at 100 ℃ under the conditions of digestion of urine samples, the use of iodine arsenic redox catalytic reaction.
H3AsO3 2Ce4 H2O → H3AsO4 2Ce3 2H
The reaction of yellow Ce4 is reduced to colorless Ce3, the higher the iodine content, the faster the reaction, the remaining less Ce4; control
The reaction temperature and time, the absorbance value of Ce4 remaining in the colorimetric system, using the mass concentration of iodine and the corresponding measured absorbance value
The linear relationship of the numerical calculation of iodine content.
3 instruments
3.1 digestion temperature control heating device. constant temperature digestion instrument (temperature difference between holes ≤ 1 ℃).
3.2 digital display spectrophotometer, 1cm cuvette.
3.3 super-heated water bath. temperature control accuracy of ± 0.3 ℃.
3.4 glass test tube. 15mm × 150mm.
3.5 stopwatch.
4 reagent
4.1 Reagents Specifications. Unless otherwise specified, the reagents used are analytical reagents, experimental water should be consistent with GB/T 6682 two water specifications.
4.2 Ammonium persulfate [(NH4) 2S2O8, Mr = 228.2].
4.3 sulfuric acid (H2SO4, ρ20 ℃ = 1.84g/mL), excellent grade pure.
4.4 Arsenic trioxide (As2O3, Mr = 197.8).
4.5 Sodium chloride (NaCl, Mr = 58.4), excellent grade pure.
4.6 Sodium hydroxide (NaOH, Mr = 40.0).
4.7 cerium ammonium sulfate [Ce (NH4) 4 (SO4) 4 · 2H2O, Mr = 632.6] or cerium ammonium sulfate tetrahydrate [Ce
Mr = 668.6].
4.8 Potassium iodate (KIO3, Mr = 214.0), reference reagent or standard.
5 solution preparation
5.1 ammonium persulfate solution {c [(NH4) 2S2O8] = 1.0mol/L}. Weigh 114.1g of ammonium persulfate (4.2) was dissolved in about 400mL of pure water
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