GB/T 23773-2009 in English

VALID

Inorganic chemicals for industrial use - General method for determination of ammonium content - Nesslers reagent colorimetric method

Issued on:2009-05-13
Implemented on:2010-01-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $180.00
$175.00

Standard No:	GB/T 23773-2009
Document status:	VALID
Title in English:	Inorganic chemicals for industrial use - General method for determination of ammonium content - Nesslers reagent colorimetric method
Title in Chinese:	无机化工产品中铵含量测定的通用方法纳氏试剂比色法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2009-05-13
Implemented on:	2010-01-01
ICS Classification:	71.060.01-Inorganic chemicals in general
Chinese Classification:	G10-Inorganic chemicals in general
Professional Classification:	GB-National Standard
Related Keywords:	reagent colorimetric method colorimetric method introduction general method ammonium content industrial use
Related Topics:	Nessler's reagent Chemical Products Inorganic Chemical Products Colorimetry Nessler Nessler's reagent method Nessler's reagent peak How to use micro cuvette Method for Determination of Sulfur Content in Inorganic Chemicals Universal Reagent Universal Reagent Nessler cup Two Nessler reagents Inorganic ammonium content in brine Indigo method and Nessler's reagent Method for testing ammonium Ammonium root determination method Determination method of ammonium root Ammonium root determination method Ammonium test method Nessler test Nessler's reagent test method Colorimetric reagent Laboratory Nessler's Reagent General Inorganic Reagents Nessler's reagent Which Nessler's reagent is better? Nessler's reagent colorimetric method Inorganic chemical industry Griess reagent colorimetric method Nessler's reagent Reagent gb content determination in Chinese Nessler's reagent ion Ammonium test method Ammonium root measurement method Method for Measuring Ammonium General Assay Method Nessler reagent products comparative method in determination of content Reagent Reagent Reagent Assay Method GBT23773 GB/T 23773-2009 General method for the determination of ammonium Jenoptik measuring products Ammonium content determination method ISO How to prepare Nessler's reagent General method for determination of selenium in inorganic chemical products Ammonium salt determination method Nessler's reagent Determination of ammonium in boiling liquid Colorimetric method for determining selenium content in urine Standard curve Nessler's reagent method Method for testing jewelry with ammonium sulfide

《GB/T 23773-2009无机化工产品中铵含量测定的通用方法纳氏试剂比色法》由TC63（全国化学标准化技术委员会）归口，TC63SC1（全国化学标准化技术委员会无机化工分会）执行，主管部门为中国石油和化学工业联合会。
本标准规定了无机化工产品中铵含量测定的通用方法纳氏试剂比色法的方法提要、安全提示、一般规定、试剂、仪器、设备、分析步骤和结果计算。
本标准适用于无机化工产品中微量铵离子的测定。试验溶液体积为100 mL 时,铵离子浓度ρ(NH4)≤2mg/L。试验溶液体积为100mL 时,目视法最低检出浓度为0.02mg/L。分光光度法使用光程长为1cm 比色皿时,最低检出浓度为0.05mg/L。当ρ(NH4)=1.0mg/L 时,灵敏度约为0.2个吸光度单位。

Introduction

1. Standard Overview and Scope of Application

GB/T 23773-2009 "General Method for Determination of Ammonium Content in Inorganic Chemical Products - Nessler's Reagent Colorimetric Method" was issued on May 13, 2009 and implemented on January 1, 2010. This standard was proposed by the China Petroleum and Chemical Industry Association, and the main drafting units were Duofuduo Chemical Co., Ltd., CNOOC Tianjin Chemical Research and Design Institute, etc.

2. Method Principle

In alkaline solution, free ammonia or bound ammonium reacts with Nessler's reagent to form a light yellow to brownish red compound. This method is applicable to the determination of trace ammonium ions (NH4+) in inorganic chemical products.

Project	Spectrophotometry	Visual colorimetry
Sensitivity	0.05 mg/L	0.02 mg/L
Detection range	Applicable to higher concentrations	Applicable to lower concentrations

3. Interference and elimination analysis

The sample contains calcium, magnesium, iron and other ions, which will interfere with the determination. It is recommended to use potassium sodium tartrate solution to mask these metal ions, and to use distillation to separate ammonia and other interfering components when necessary.

4. Analysis steps

According to the standard requirements, a series of ammonium standard working solutions should be prepared before each measurement, and a working curve should be drawn. The absorbance value is measured by colorimetry or spectrophotometry, and the ammonium content is determined by looking up the table.

Main instruments and reagents

Spectrophotometer (with 1 cm or 3 cm cuvette)
Colorimetric tube (100 mL)
No ammonia water, sodium hydroxide solution, Nessler's reagent, etc.

More samples: YD/T 3934-2021 JJG 21-2008 GB 50021-2001(2009)

Sample only — not a preview of GB/T 23773-2009

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