GB/T 23943-2009 English PDF

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GB/T 23943-2009: Inorganic chemicals for industrial use - General method for the determination of chromium (VI) content. 1, 5-Diphenylcarbohydrazide spectrophotometric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23943-2009	189	Add to Cart	3 days	Inorganic chemicals for industrial use - General method for the determination of chromium (VI) content. 1, 5-Diphenylcarbohydrazide spectrophotometric method	Valid

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Basic data

Standard ID: GB/T 23943-2009 (GB/T23943-2009)
Description (Translated English): Inorganic chemicals for industrial use - General method for the determination of chromium (VI) content. 1, 5-Diphenylcarbohydrazide spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G10
Classification of International Standard: 71.060.01
Word Count Estimation: 8,813
Date of Issue: 2009-06-02
Date of Implementation: 2010-02-01
Quoted Standard: GB/T 6682-2008; HG/T 3696.2; HG/T 3696.3
Regulation (derived from): National Standard Approval Announcement 2009 No.8 (Total No.148)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the general method of inorganic chemical products Determination of hexavalent chromium-Diphenylcarbazide Spectrophotometric principle, safety tips, general provisions, reagents, instruments, equipment, analysis steps and calculations.

GB/T 23943-2009: Inorganic chemicals for industrial use - General method for the determination of chromium (VI) content. 1, 5-Diphenylcarbohydrazide spectrophotometric method

---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.
Inorganic chemicals for industrial use. General method for the determination of chromium (VI) content. 1, 5-Diphenylcarbohydrazide spectrophotometric method ICS 71.060.01 G10 National Standards of People's Republic of China Inorganic chemical products General method for determination of Cr (VI) Diphenyl hydrazine spectrophotometry Posted 2009-06-02 2010-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

Appendix A of this standard and Appendix B is an informative annex. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee chemical inorganic chemicals Club (SAC/TC63/SC1) centralized. This standard is mainly drafted by. CNOOC Tianjin Chemical Research & Design Institute, Sichuan Anxian Yinhe Group Co., Ltd. to build, access to Tianjin Habitat Inspection and Quarantine Bureau. The main drafters of this standard. Lusi Wei, Xie You-cai, Liu Shao from Qin Long, Lu Gang. This standard is the first release. Inorganic chemical products General method for determination of Cr (VI) Diphenyl hydrazine spectrophotometry

1 Scope

This standard specifies the general method of inorganic chemical products Determination of hexavalent chromium --- diphenyl hydrazine spectrophotometry principle, Safety tips, general provisions, reagents, instruments, equipment, analytical procedures and the results of calculations. This standard applies to inorganic chemical products - Determination of trace hexavalent chromium ions, hexavalent chromium (Cr6 +) at 0.004mg/L ~ 1.000mg/L range is linear. The test solution volume 50mL, using the optical path length of the cuvette than 3cm, the method of the smallest Detection limit was 0.2μg hexavalent chromium, the detection limit was 0.004mg/L; using the optical path than 1cm cuvette, measuring the concentration limit 1.000mg/L (does not interfere with the determination of ions see Appendix A).

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6682-2008 analytical laboratory use specifications and test methods (ISO 3696. 1987, MOD) Preparation of HG/T 3696.2 inorganic chemical products, chemical analysis of impurity standard solution Preparations of HG/T 3696.3 inorganic chemical products, chemical analysis Principle 3 In acidic solution, hexavalent chromium diphenyl hydrazine reacts with purple compound, at a wavelength of 540nm at a concentration of the complex Absorbance line with Lambert - Beer law, can be used for the determination. The molar extinction coefficient of 4 × 104.

4 Safety Tips

Reagents used in this test method are toxic or corrosive, the operator must be careful! Such as water splashed on the skin should immediately Flushing, severe cases should be treated immediately.

5 General Provisions

This standard reagents and water, did not indicate when the other requirements, refer to analytically pure reagents and GB/T 6682-2008 specified three Grade water. Impurity standard solution, preparations and products needed to test, in the absence of other requirements specified according to HG/T 3696.2, HG/T 3696.3 Provisions prepared.

6 Reagents

Sulfuric acid solution was 6.1. 1 + 1. Phosphoric acid 6.2. 1 + 1. 6.3 Sodium hydroxide solution. 4g/L. 6.4 chromium standard stock solution. 1mL solution containing chromium (Cr) 0.10mg. ......

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