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GB/T 23773-2009 English PDF

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GB/T 23773-2009: Common methods of inorganic chemical products ammonium content of Nessler reagent colorimetric determination
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PDF similar to GB/T 23773-2009


Standard similar to GB/T 23773-2009

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Basic data

Standard ID GB/T 23773-2009 (GB/T23773-2009)
Description (Translated English) Common methods of inorganic chemical products ammonium content of Nessler reagent colorimetric determination
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G10
Classification of International Standard 71.060.01
Word Count Estimation 12,116
Date of Issue 2009-05-13
Date of Implementation 2010-01-01
Regulation (derived from) PRC National Standard Approval Announcement 2009 No.6 (Total No.146)
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 ammonium Nessler reagent colorimetric method feeds, safety tips, general provisions, reagents, instruments, equipment, analysis steps and calculations. This standard applies to the determination of trace inorganic chemicals ammonium ions. 100mL volume of the test solution, the ammonium ion concentration p (NH4) <2mg/L. The test solution volume of 100mL, the visual method detection limit was 0. 02mg/L. Spectrophotometry using an optical path length of 1cm cuvette, the minimum detectable concentration of 0. 05mg/L. When p (NH4) = 1. 0mg/L, the sensitivity is approximately 0. 2 absorbance units.

GB/T 23773-2009: Common methods of inorganic chemical products ammonium content of Nessler reagent colorimetric determination


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Common methods of inorganic chemical products ammonium content of Nessler's reagent colorimetric determination ICS 71.060.01 G10 National Standards of People's Republic of China General method for the determination of ammonium inorganic chemical products Nessler's reagent colorimetric Posted 2009-05-13 2010-01-01 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. Fluoride Chemicals Co., Ltd., CNOOC Tianjin Chemical Research & Design Institute, Tianjin Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. Wang Jianping, Shi Xiuhua, Lu Siwei, Lu Gang, Liu Jun. This standard is the first release. General method for the determination of ammonium inorganic chemical products Nessler's reagent colorimetric

1 Scope

This standard specifies the general method of inorganic chemical products Determination of ammonium Nessler reagent colorimetric method feeds, safety tips, general Regulations, reagents, instruments, equipment, analytical procedures and the results of calculations. This standard applies to the determination of trace inorganic chemical products, ammonium ions. 100mL of test solution volume, the concentration of ammonium ion ρ (NH4) ≤2mg/L. The test solution volume of 100mL, the visually minimum detectable concentration of 0.02mg/L. Using spectrophotometry Optical path length 1cm cuvette, the minimum detectable concentration of 0.05mg/L. When ρ (NH4) = 1.0mg/L, the sensitivity is about 0.2 Absorbance units.

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

3 Method summary

In alkaline solution, the free ammonia or ammonium bound Nessler reagent to produce a light yellow to reddish brown insoluble compound. Ammonium content Higher, and the resultant reddish-brown precipitation; ammonium content is low, the formation of a stable suspension, the available visual colorimetry standard than liquid ratio on Or spectrophotometry.

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

6.1 No ammonia; 6.2 Sodium hydroxide solution. 320g/L. 6.3 Ammonium standard solution Ⅰ. 1mL solution containing ammonium (NH4) 0.10mg; Pipette Pipette 10mL ammonium standard solution according to HG/T 3696.2 prepared, placed in 100mL volumetric flask, dilute to the mark with water

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