GB/T 34500.5-2017 English PDF

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GB/T 34500.5-2017: Chemical analysis methods for rare earth residue and wastewater -- Part 5: Determination of ammonia nitrogen content
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GB/T 34500.5-2017	359	Add to Cart	4 days	Chemical analysis methods for rare earth residue and wastewater -- Part 5: Determination of ammonia nitrogen content	Valid

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Basic data

Standard ID: GB/T 34500.5-2017 (GB/T34500.5-2017)
Description (Translated English): Chemical analysis methods for rare earth residue and wastewater -- Part 5: Determination of ammonia nitrogen content
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H14
Classification of International Standard: 77.120.99
Word Count Estimation: 18,170
Date of Issue: 2017-12-29
Date of Implementation: 2018-09-01
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 34500.5-2017: Chemical analysis methods for rare earth residue and wastewater -- Part 5: Determination of ammonia nitrogen content

---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 analysis methods for rare earth residue and waste water - Part 5. Determination of ammonia nitrogen content ICS 77.120.99 H14 National Standards of People's Republic of China Rare earth waste, waste water chemical analysis methods Part 5. Determination of ammonia nitrogen content Part 5. Determinationofammonianitrogencontent 2017-12-29 Posted 2018-09-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

GB/T 34500 "rare earth waste, chemical analysis of waste water" is divided into 5 parts. --- Part 1. Determination of the amount of fluoride ion selective electrode method; --- Part 2. Determination of chemical oxygen demand (COD); --- Part 3. Determination of weak radioactivity (total activity of α and β); --- Part 4. Determination of copper, zinc, lead, chromium, cadmium, barium, cobalt, manganese, nickel, titanium content; Inductively coupled plasma atomic emission spectrometry; --- Part 5. Determination of ammonia nitrogen content. This section GB/T 34500 Part 5. This section drafted in accordance with GB/T 1.1-2009 given rules. This part of the National Rare Earth Standardization Technical Committee (SAC/TC229) and focal point. This section is drafted. Baotou Rare Earth Research Institute, Qigong Rare Earth Group Co., Ltd. (Ganzhou Ayk sharp detection Technology Co., Ltd.) GB (Beijing) Inspection and Certification Co., Ltd., Ganzhou Chenguang Rare Earth New Materials Co., Ltd., Ganzhou Institute of Nonferrous Metallurgy, Steel Yanake inspection Measurement Technology Co., Ltd., China Nonferrous Guilin Institute of Mineral Geology Co., Ltd., Tianjin Baotou Rare Earth Research Institute Co., Ltd.. The main drafters of this section. Zhang Lifeng, Wen Bin, Zhang Hong, Yao Nanhong, Zhu Yueran, Qin Li, Chen Yingchun, Chen Yan, Wang Li, Dong Tao, Hou Hongxia, Xie Lingjun, Zhao Changyu, Hu Weikang, Yang Qianqian. Rare earth waste, waste water chemical analysis methods Part 5. Determination of ammonia nitrogen content Warning - HgCl2 and HgI2 are highly toxic substances and should be avoided by skin and mouth.

1 Scope

GB/T 34500 provisions of this part of the mining, mineral processing, smelting rare earth residue leaching solution and wastewater ammonia (nitrogen) test methods. This section applies to mining, mineral processing, smelting rare earth residue leaching solution and wastewater ammonia (nitrogen) determination. A total of three A method of analysis. Method 1 is Nessler's reagent spectrophotometry, method 2 is salicylic acid spectrophotometry, method 3 is distillation-neutralization titration. Measurement range of Method 1. 0.5 mg/L to 900.0 mg/L; Measurement range of Method 2. 1.00 mg/L to.200.00 mg/L; Measuring range. 100mg/L ~ 60000mg/L.

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. Solid waste extraction toxicity Toxicity method HNO3 method Water quality - Determination of ammonia nitrogen - Nessler 's reagent spectrophotometric method 3 Method 1. Nessler's reagent spectrophotometry When the amount of ammonia nitrogen in the range of 1mg/L ~ 500mg/L, Method 1 for the arbitration method. 3.1 method principle The sample in alkaline conditions, mercuric iodide and potassium iodide alkaline solution and ammonia reaction generated yellowish brown complex at a wavelength of 420nm Absorbance was measured. 3.2 Reagents and materials The water used in the experiment was ammonia-free. 3.2.1 Light magnesium oxide. The magnesia placed in 500 ℃ muffle furnace 1h, remove the carbonate. 3.2.2 nitric acid (ρ = 1.40g/mL), excellent grade pure. 3.2.3 sulfuric acid (ρ = 1.84g/mL), excellent grade pure. 3.2.4 hydrochloric acid (1mol/L), excellent grade pure. 3.2.5 sodium hydroxide solution (1mol/L). 3.2.6 sulfuric acid (1 1), excellent grade pure. 3.2.7 Nitric acid (1 1), excellent grade pure. 3.2.8 sulfuric acid, nitric acid mixture. stirring, sulfuric acid (3.2.6), nitric acid (3.2.7) by volume ratio 1.5. 1 mix, stand-by. 3.2.9 boric acid solution (20g/L). ......

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