GB/T 33086-2016Water treatment chemical—Determination of arsenic and mercury—Atomic fluorescence spectrometry (English PDF)
水处理剂 砷和汞含量的测定 原子荧光光谱法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 13, 2016
Implementation date
May 1, 2017
Scope
GB/T 33086-2016 is the English-translated version of 水处理剂 砷和汞含量的测定 原子荧光光谱法.
GB/T 33086-2016 is the Chinese standard "Water treatment chemical—Determination of arsenic and mercury—Atomic fluorescence spectrometry". Its scope clause reads: This standard specifies the determination of arsenic and mercury in water treatment agents by atomic fluorescence spectrometry.
This standard is applicable to the detection of arsenic and mercury in water treatment agents using atomic fluorescence spectrometry. Its clauses include normative reference documents; general rules.
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Document preview — GB/T 33086-2016
National Standard of the People's Republic of China
- ICS
- 13.060.50
- Classification
- G 76
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 normative reference documents
- 3 General rules
- 4.1 Method Summary
- 4.2 Reagents and materials
1 Scope
This standard specifies the determination of arsenic and mercury in water treatment agents by atomic fluorescence spectrometry.
This standard is applicable to the detection of arsenic and mercury in water treatment agents using atomic fluorescence spectrometry.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB/T 602 Preparation of standard solutions for the determination of impurities in chemical reagents
GB/T 6682 Analytical laboratory water specifications and test methods
3 General rules
The reagents used in this standard, unless otherwise specified, use analytical reagents and secondary water as specified in GB/T 6682.
The standard solution for the determination of impurities required in the test shall be prepared in accordance with the provisions of GB/T 602 when no other requirements are specified.
Determination of arsenic content
4.1 Method Summary
After the sample was digested with acid, thiourea was added to reduce the pentavalent arsenic to trivalent arsenic, and further adding boron hydride to further reduction
Arsenic, decomposed into atomic arsenic by argon into the quartz atomizer, produces atomic fluorescence under the excitation of the arsenic hollow cathode lamp,
The fluorescence intensity in the fixed conditions and the measured solution is proportional to the concentration of arsenic, which measured the arsenic content of the sample.
4.2 Reagents and materials
4.2.1
hydrochloric acid (excellent grade pure).
4.2.2
nitric acid (excellent grade pure).
4.2.3 Hydrochloric acid solution
1 19.
4.2.4 Nitric acid solution
1 4.
4.2.5 Thiourea solution
100 g/L.
4.2.6 Potassium borohydride - sodium hydroxide solution
Weigh 2.0 g of sodium hydroxide and 10.0 g of potassium borohydride in a polyethylene beaker, dissolved with water and
Diluted to 1000mL, stored in a brown bottle, the solution is now with the distribution.
4.2.7 arsenic standard stock solution
0.1mg/mL.
4.2.8 Arsenic standard solution
Remove 10.00mL arsenic standard stock solution in 100mL volumetric flask, add 10.0mL hydrochloric acid, diluted with water […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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