GB/T 6730.19-2016 English PDF

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GB/T 6730.19-2016: Iron ores -- Determination of phosphorus content -- Bismuth phosphomolybdate blue spectrophotometric method
Status: Valid

GB/T 6730.19: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 6730.19-2016	78	Add to Cart	1 days	Iron ores -- Determination of phosphorus content -- Bismuth phosphomolybdate blue spectrophotometric method	Valid
GB/T 6730.19-1986	199	Add to Cart	2 days	Methods for chemical analysis of iron ores. The bismuth phosphomolybdate blue photometric method for the determination of phosphorus content	Obsolete

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GB/T 6730.2   GB/T 6730.1   GB/T 6730.11   GB/T 6730.23   GB/T 6730.24   GB/T 6730.28   

Basic data

Standard ID: GB/T 6730.19-2016 (GB/T6730.19-2016)
Description (Translated English): Iron ores -- Determination of phosphorus content -- Bismuth phosphomolybdate blue spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D31
Classification of International Standard: 73.060.10
Word Count Estimation: 10,129
Date of Issue: 2016-12-13
Date of Implementation: 2017-09-01
Older Standard (superseded by this standard): GB/T 6730.19-1986
Regulation (derived from): National Standard Notice No.6816 of 2016
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 6730.19-2016: Iron ores -- Determination of phosphorus content -- Bismuth phosphomolybdate blue spectrophotometric 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.
Iron ores - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method ICS 73.060.10 D31 National Standards of People's Republic of China Replacing GB/T 6730.19-1986 Determination of phosphorus content in iron ore Bismuth - phosphorus - molybdenum blue spectrophotometric method Ironores-Determination of phosphorusoruscontent- 2016-12-13 released 2017-09-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

GB/T 6730 "iron ore" is divided into dozens of parts. This part is part 19 of GB/T 6730. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part of the GB/T 6730.19-1986 "iron ore chemical analysis method bismuth phosphorus molybdenum blue photometric determination of phosphorus". This part with GB/T 6730.19-1986 compared to the editorial changes, the main technical changes are as follows. --- the standard name to "iron ore phosphorus content determination bismuth phosphorus molybdenum blue spectrophotometric method"; --- Added "warning" "normative reference document" "test report" and so on; --- the measurement range from 0.010% ~ 0.50% to 0.010% to 1.00%; - increased the operation of sodium thiosulfate - sodium sulfite masking arsenic; The inter-laboratory precision tests were carried out, and the "allowable difference" was replaced by the statistical repeatability r and the reproducibility limit R. This part is made by China Iron and Steel Industry Association. This section is headed by the National Commission on Standardization of Iron Ore and Direct Reductive Iron (SAC/TC317). This part of the drafting unit. Wuhan Iron and Steel (Group) Company, Metallurgical Industry Information Standards Institute. The main drafters of this part. Shen Ke, Lu Qi, Guo Fang, Li Xiaojie, Cui Jun, Luo Hongbin, Chen Xiaohong, Chen Zhibin. This part of the previous version of the standard to replace the release of the situation. --- GB/T 6730.19-1986. Determination of phosphorus content in iron ore Bismuth - phosphorus - molybdenum blue spectrophotometric method WARNING - Personnel using this section should have formal laboratory experience. This section does not indicate all possible security issues with the user Have the responsibility to take appropriate safety and health measures and to ensure compliance with the conditions set forth in the relevant national regulations.

1 Scope

This part of GB/T 6730 specifies the determination of phosphorus content by bismuth-phosphorus molybdenum blue spectrophotometry. This part is applicable to the determination of phosphorus content in iron ore, iron concentrate, sinter and pellet, and the determination range. (mass fraction) 0.010% ~ 1.00%.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 6379.1 Accuracy of measurement methods and results (accuracy and precision) - Part 1. General and definitions GB/T 6379.2 Accuracy of measurement methods and results (accuracy and precision) - Part 2. Determination of standard measurement methods The basic method of sex and reproducibility GB/T 6682 Analytical laboratory water specifications and test methods Preparation of pre - dried samples for analysis of iron ore GB/T 6730.1 Metallurgical products - Chemical analysis - Spectrophotometric methods Representation and Judgment of Numerical Correction Rule and Limit Value of GB/T 8170 GB/T 10322.1 Iron Ore Sampling and Sample Preparation GB/T 12806 laboratory glass instrument single standard line capacity bottle GB/T 12807 Laboratory glass instruments - Index pipettes GB/T 12808 Laboratory glass instruments Single line suction pipette

3 principle

Samples with hydrochloric acid, nitric acid, hydrofluoric acid decomposition, perchloric acid smoke to catch fluoride, insoluble residue filter, ashing, burning, with sodium carbonate melting, hydrochloric acid Dissolved, the residue treatment solution and the main liquid merger. In the sulfuric acid medium phosphorus and bismuth and ammonium molybdate to form complexes, followed by ascorbic acid to molybdenum blue. The absorbance was measured at a wavelength of 720 nm. 20 mg of titanium dioxide, 10 mg of manganese, 2 mg of copper, 10 mg of copper, 0.5 mg of tetravalent vanadium, 3 mg of nickel, 6 mg of hexavalent chromium, Cerium 10mg, iron 50mg and zirconium 5mg below the determination of no effect, niobium pentoxide content of 0.3% or less without interference. Arsenic in the treatment test Such as hydrogen bromide can be used to eliminate, or arsenic 0.3mg or less in the color with sodium thiosulfate to reduce the arsenic to the elimination of interference.

4 reagent

Unless otherwise stated, only the reagents identified as analytical reagents and those of Class 3 and Grade 3 in accordance with GB/T 6682 are used in the analysis. Water or water equivalent to its purity. ......

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