YS/T 358.1-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YS/T 358.1-2025	RFQ	ASK	3 days	Chemical Analysis of Tantalum and Niobium Iron Concentrate - Part 1: Determination of Tantalum and Niobium Content - Weighing Method and X-Ray Fluorescent Spectrometry	Valid
YS/T 358.1-2011	159	Add to Cart	3 days	Methods for chemical analysis of tantalite, columbite concentrate. Part 1: Determination of tantalum and niobium content. Gravimatric of paper chromatography method	Valid
YS/T 358-1994	239	Add to Cart	2 days	(Iron, tantalum, niobium chemical analysis of iron ore)	Obsolete

Basic data

Standard ID: YS/T 358.1-2025 (YS/T358.1-2025)
Description (Translated English): Chemical Analysis of Tantalum and Niobium Iron Concentrate - Part 1: Determination of Tantalum and Niobium Content - Weighing Method and X-Ray Fluorescent Spectrometry
Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard: H14
Classification of International Standard: 77.120.99
Date of Issue: 2025-04-10
Date of Implementation: 2025-11-01
Older Standard (superseded by this standard): YS/T 358.1-2011
Issuing agency(ies): Ministry of Industry and Information Technology

YS/T 358.1-2011: Methods for chemical analysis of tantalite, columbite concentrate. Part 1: Determination of tantalum and niobium content. Gravimatric of paper chromatography 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 tantalite, columbite concentrate.Part 1. Determination of tantalum and niobium content.Gravimatric of paper chromatography method ICS 73.060 D43 People's Republic of China Nonferrous Metals Industry Standard Replacing YS/T 358-1994 Chemical analysis of tantalum iron and niobium iron concentrates Part 1. determination of tantalum and niobium content Paper color gravimetric method Methodsforchemicalanalysisoftantalite, columbiteconcentrate- Part 1. Determinationoftantalumandniobiumcontent- 2011-12-20 release 2012-07-01 Implementation Issued by the Ministry of Industry and Information Technology of the People's Republic of China

Foreword

YS/T 358 "tantalum iron, niobium iron concentrate chemical analysis method" includes 12 parts. - Part 1. Determination of tantalum and niobium content Paper color layer weight method; - Part 2. Determination of titanium dioxide - Amipyridine methane spectrophotometric method; - Part 3. Determination of silicon dioxide - Mo - Mo - blue spectrophotometric and gravimetric methods; - Part 4. Determination of tungsten trioxide - Thiocyanate spectrophotometric method; - Part 5. Determination of uranium content - Inductively coupled plasma - atomic emission spectrometry; - Part 6. Determination of thorium oxide - Inductively coupled plasma - atomic emission spectrometry; - Part 7. Determination of iron content - Inductively coupled plasma - atomic emission spectrometry; - Part 8. Determination of iron content - Potassium dichromate titration; - Part 9. Determination of antimony content - Inductively coupled plasma - atomic emission spectrometry; - Part 10. Determination of tin content Potassium iodate titration; - Part 11. Determination of manganese content - Atomic absorption spectroscopy; - Part 12. Determination of wet water content - Weight method. This part is part 1 of YS/T 358. This part of the replacement of YS/T 358-1994 "tantalum iron, niobium iron concentrate chemical analysis method" (formerly YB874-76) Part II "tantalum, niobium Determination of the amount of paper (paper color layer weight method) ". The main changes in this part compared with the second part of YS/T 358-1994 are as follows. --- sample decomposition from alkali to hydrofluoric acid, nitric acid microwave digestion; --- gives the lower limit of detection; --- increase the precision terms; --- The text format has been modified to increase the quality assurance and control terms. This part is the national nonferrous Metals Standardization Technical Committee (SAC/TC243). This part of the drafting unit. Ganzhou Nonferrous Metallurgy Research Institute, Jiujiang tantalum and niobium limited liability company, Conghua tantalum and niobium smelter. This part of the main drafters. Pan Jianzhong, Cai Xuejian, Ye Chunsheng, Deng Yanan, Song Jinhua, Huang Shuang This part of the previous version of the standard to replace the release of the situation. YB874-76, YS/T 358-1994. Chemical analysis of tantalum iron and niobium iron concentrates Part 1. determination of tantalum and niobium content Paper color gravimetric method

1 Scope

This method specifies the determination method of tantalum and niobium content in tantalum iron and niobium iron concentrate. This method is suitable for the determination of tantalum and niobium in tantalum iron and niobium iron concentrate. The measurement range is 5.00% ~ 60.00%.

2 method summary

The samples were separated by hydrofluoric acid and nitric acid microwave digestion, and chromatographic separation was carried out with methyl isobutyl ketone-butanone-hydrofluoric acid-nitric acid as developing solvent, And then cut off tantalum, niobium ribbon, ashes burned weighing. Calculate the amount of tantalum and niobium.

3 reagent

3.1 hydrofluoric acid (ρ1.14g/mL). 3.2 nitric acid (ρ1.42g/mL). 3.3 Butanone (ρ 0.92g/mL). 3.4 tannin solution (50g/L). 3.5 Development agent. methyl isobutyl ketone, butanone, hydrofluoric acid, nitric acid to volume ratio of 44.44.8. 4 mixed evenly. 3.6 color layer paper. 3 color layer paper, cut into 22cm × 28cm, ammonium nitrate solution (100g/L) soaking the entire length of two-thirds, Slightly dry spare. 3.7 ammonia neutralizer. with a large dryer, sieve below the storage of concentrated ammonia (ρ0.88g/mL).

4 instruments

Microwave digestion.

5 samples

5.1 Specimen size less than 0.074mm. 5.2 samples in 105 ℃ ~ 110 ℃ pre-bake 2h, placed in a dryer to cool to room temperature.

6 Analysis steps

6.1 samples Weigh 0.10g sample (5), accurate to 0.0001g. ......

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