GB/T 7739.12-2016 English PDFUS$179.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 7739.12-2016: Methods for chemical analysis of gold concentrates -- Part 12: Determination of arsenic, mercury, cadmium, lead and bismuth contents -- Atomic fluorescence spectrometric method Status: Valid
Basic dataStandard ID: GB/T 7739.12-2016 (GB/T7739.12-2016)Description (Translated English): Methods for chemical analysis of gold concentrates -- Part 12: Determination of arsenic, mercury, cadmium, lead and bismuth contents -- Atomic fluorescence spectrometric method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: D46 Classification of International Standard: 77.120.99 Word Count Estimation: 9,941 Date of Issue: 2016-08-29 Date of Implementation: 2017-07-01 Regulation (derived from): National Standard Announcement 2016 No.14 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 7739.12-2016: Methods for chemical analysis of gold concentrates -- Part 12: Determination of arsenic, mercury, cadmium, lead and bismuth contents -- Atomic fluorescence spectrometric 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. Methods for chemical analysis of gold concerntrates - Part 12. Determination of arsenic, mercury, cadmium, lead and bismuth contents - Atomic fluorescence spectrometric method ICS 77.120.99 D46 National Standards of People's Republic of China Gold chemical analysis method Part 12. determination of arsenic, mercury, cadmium, lead and bismuth Atomic fluorescence spectrometry Part 12. Determination ofarsenic, mercury, cadmium, leadandbismuthcontents- 2016-08-29 released 2017-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released ForewordGB/T 7739 "gold concentrate chemical analysis method" is divided into 12 parts. Part 1. Determination of gold and silver; - Part 2. Determination of silver; Part 3. Determination of arsenic content; - Part 4. Determination of copper content; - Part 5. Determination of lead content; - Part 6. Determination of zinc content; - Part 7. Determination of iron content; - Part 8. Determination of sulfur content; - Part 9. Determination of carbon content; - Part 10. Determination of antimony content; - Part 11. Determination of arsenic and bismuth; - Part 12. Determination of arsenic, mercury, cadmium, lead and bismuth - Atomic fluorescence spectrometric method. This part is part 12 of GB/T 7739. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part of the National Gold Standardization Technical Committee (SAC/TC379) proposed and centralized. This part is responsible for drafting units. Changchun Gold Research Institute. This part participates in the drafting unit. Beijing Mining and Metallurgy Research Institute, Zijin Mining Group Co., Ltd., Lingbao Gold Co., Ltd. Dongguo Da Gold Co., Ltd., Lingbao Jinyuan Mining Co., Ltd. This part of the main drafters. Chen Yonghong, Wang Ju, Su Guangdong, Yan Kai, Chen Diangeng, Tang Shufang, Kuai Lijun, Guo Zhijuan, Chen Zhuhai, Zhu Yansheng, Kong Lingjiang, Wang Qingli. Gold chemical analysis method Part 12. determination of arsenic, mercury, cadmium, lead and bismuth Atomic fluorescence spectrometry1 ScopeThis part of GB/T 7739 specifies the determination of arsenic, mercury, cadmium, lead and bismuth in gold concentrates. This part applies to the determination of arsenic, mercury, cadmium, lead and bismuth in gold concentrates. Measuring range. 0.00004% ~ 0.20%.2 method summaryThe sample was dissolved in a water bath with hydrochloric acid and nitric acid or dissolved in hydrochloric acid, nitric acid, perchloric acid and hydrofluoric acid. The As (Ⅴ) in the test solution was treated with a reducing agent, (Ⅲ), Cd (Ⅳ) is prereduced to Cd (Ⅱ), lead, mercury and bismuth are not pre-reduced, masking agent is used to mask the interfering elements in the test solution. A certain acidity, the test solution and potassium borohydride solution through the hydride generator to produce hydride, with the carrier gas into the quartz tube atomization, atomic fluorescence The fluorescence intensity was measured on a light spectrometer and the arsenic, mercury, cadmium, lead and bismuth were calculated according to the standard curve method.3 reagentUnless otherwise stated, only reagents and secondary deionized water identified as analytical pure were used in the analysis. 3.1 hydrochloric acid (ρ1.19g/mL), excellent grade pure. 3.2 nitric acid (ρ1.42g/mL), excellent grade pure. 3.3 hydrofluoric acid (ρ1.18g/mL), excellent grade pure. 3.4 perchloric acid (ρ1.76g/mL), excellent grade pure. 3.5 sulfuric acid (ρ1.84g/mL), excellent grade pure. 3.6 Hydrochloric acid (1 1). diluted with hydrochloric acid (3.1). 3.7 Hydrochloric acid (1 19). diluted with hydrochloric acid (3.1). 3.8 Hydrochloric acid (1 49). diluted with hydrochloric acid (3.1). 3.9 nitric acid (14). diluted with nitric acid (3.2). 3.10 Sulfuric acid (1 4). diluted with sulfuric acid (3.5). 3.11 mixed acid (1 3 4). 1 volume nitric acid (3.2), 3 volumes of hydrochloric acid (3.1) and 4 volumes of water mixed evenly, is now available. 3.12 Sodium hydroxide (5 g/L). 3.13 Sodium hydroxide (200 g/L). 3.14 potassium borohydride solution Ⅰ (20g/L). Weigh 10.0g potassium borohydride dissolved in 500mL sodium hydroxide solution (3.12), is now available. 3.15 Potassium borohydride solution II (20g/L). Weigh 10.0g potassium borohydride in 500mL sodium hydroxide solution (3.12), add 5g Potassium ferricyanide, dissolved, is now available. 3.16 thiourea - ascorbic acid solution (100 g/L). 3.17 oxalic acid (80g/L). 3.18 Cobalt chloride hexahydrate solution (0.5g/L). 3.19 Sodium pyrophosphate (20 g/L). ...... |
