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GB/T 35496-2017: Chemical reagent -- General method for the determination of nitrate
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 35496-2017 | English | 119 |
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Chemical reagent -- General method for the determination of nitrate
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GB/T 35496-2017
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Basic data | Standard ID | GB/T 35496-2017 (GB/T35496-2017) | | Description (Translated English) | Chemical reagent -- General method for the determination of nitrate | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G60 | | Classification of International Standard | 71.040.30 | | Word Count Estimation | 6,663 | | Date of Issue | 2017-12-29 | | Date of Implementation | 2018-07-01 | | Regulation (derived from) | National Standards Bulletin 2017 No. 32 | | 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 | GB/T 35496-2017: Chemical reagent -- General method for the determination of nitrate---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.
Chemical reagent - General method for the determination of nitrate
ICS 71.040.30
G60
National Standards of People's Republic of China
Chemical reagents - Determination of nitrate General methods
2017-12-29 Posted
2018-07-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard proposed by the China Petroleum and Chemical Industry Federation.
This standard by the National Standardization Technical Committee Chemical Reagent Branch (SAC/TC63/SC3) centralized.
This standard was drafted by Guangdong Guanghua Science and Technology Co., Ltd., Shantou City, Guangdong Province, the measurement of quality supervision and inspection of national chemical reagents
Quality Supervision and Inspection Center.
The main drafters of this standard. Long Monday, the body with the company, Zhang Zhibin, Zhang Min, Li Libi, Chen Zeping, Zheng Guixuan, Chen Min, Huo Jianzeng.
Chemical reagents - Determination of nitrate General methods
1 Scope
This standard specifies the general method for the determination of nitrate by indigo carmine sodium (indigo carmine) colorimetry and brucine colorimetry.
This standard applies to the determination of trace nitrates in chemical reagents. Indigo disulphonate (indigo carmine) spectrophotometry or visual colorimetric
France detection range of 0.2μg/mL ~ 4μg/mL (NO3 dollars); brucine colorimetric detection range of 0.3μg/mL ~
6.5μg/mL (calculated as NO3).
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 602 chemical reagent impurity standard solution preparation
GB/T 603 chemical reagent test methods used in the preparation of preparations and products
GB/T 6682 analytical laboratory water specifications and test methods
GB/T 9721 chemical reagent molecular absorption spectrophotometry (UV and visible light part)
3 method principle
3.1 Indigo disulfonate (indigo carmine) colorimetric method
In sulfuric acid medium, sodium indigo disulfonate (indigo carmine) is oxidized by nitrate to yellow indigo song to fade the blue, with spectrophotometry
Method or visual colorimetric determination.
3.2 Brucine colorimetry
In sulfuric acid medium, nitrate reacts with brucine to form a yellow compound, as determined by visual colorimetry.
4 test
Warning --- part of the reagents used in this test method is toxic or corrosive, some of the test process may lead to dangerous situations, the operation
Should take appropriate safety and health measures.
4.1 General Provisions
The standard solutions, preparations and products used in this chapter are prepared according to the provisions of GB/T 602, GB/T 603, the experimental water should be consistent
GB/T 6682 in the three water specifications.
4.2 Instruments
4.2.1 General laboratory equipment.
4.2.2 spectrophotometer should be consistent with the provisions of GB/T 9721.
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