HOME   Cart(0)   Quotation   About-Us Tax PDFs Standard-List Powered by Google www.ChineseStandard.net Database: 189760 (15 Feb 2025)

YS/T 252.2-2007 English PDF

YS/T 252.2-2007_English: PDF (YS/T252.2-2007)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
YS/T 252.2-2007English70 Add to Cart 0--9 seconds. Auto-delivery Methods for chemical analysis of nickel matte. Determination of iron content. Sulfosalicylic acid phototmetric method   YS/T 252.2-2007


BASIC DATA
Standard ID YS/T 252.2-2007 (YS/T252.2-2007)
Description (Translated English) Methods for chemical analysis of nickel matte. Determination of iron content. Sulfosalicylic acid phototmetric method
Sector / Industry Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard H13
Classification of International Standard 77.120.40
Word Count Estimation 5,598
Date of Issue 2007-04-13
Date of Implementation 2007-10-01
Older Standard (superseded by this standard) YS/T 252.2-1994
Drafting Organization Jinchuan Group Ltd.
Administrative Organization National Standardization Technical Committee of non-ferrous metals
Regulation (derived from) NDRC Notice No. 22 of 2007
Proposing organization National Nonferrous Metals Standardization Technical Committee
Issuing agency(ies) PRC State and Development and Reform Commission
Summary This standard specifies the amount of iron in nickel matte Determination. This standard specifies the high nickel matte Determination of iron content. Measuring range: 0. 5% to 7%.


YS/T 252.2-2007 YS NONFERROUS INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.120.40 H 13 Replacing YS/T 252.2-1994 Methods for chemical analysis of nickel matte - Determination of iron content - Sulfosalicylic acid photometric method ISSUED ON: APRIL 13, 2007 IMPLEMENTED ON: OCTOBER 01, 2007 Issued by: National Development and Reform Commission of PRC Table of Contents Foreword ... 3 1 Scope ... 5 2 Method summary ... 5 3 Reagents ... 5 4 Instruments ... 6 5 Analytical procedures ... 6 6 Calculation and expression of analysis results ... 7 7 Precision ... 7 8 Quality assurance and control ... 8 Foreword YS/T 252 "Methods for chemical analysis of nickel matte" is divided into five parts: YS/T 252.1 Methods for chemical analysis of nickel matte - Determination of nickel content - Dimethylglyoxime gravimetric method YS/T 252.2 Methods for chemical analysis of nickel matte - Determination of iron content - Sulfosalicylic acid photometric method YS/T 252.3 Methods for chemical analysis of nickel matte - Determination of cobalt content - Flame atomic absorption spectrometric method YS/T 252.4 Methods for chemical analysis of nickel matte - Determination of cobalt content - Sodium thiosulphate titrimetric method YS/T 252.5 Methods for chemical analysis of nickel matte - Determination of sulfur content - Combustion-neutralization titrimetric method This Part is Part 2. This Part replaces YS/T 252.2-1994 "Determination of iron content by sulfosalicylic acid photometric method". Compared with YS/T 252.2-1994, this Part mainly has the following changes: - ADJUST the sample amount from 0.200 g or 0.500 g to 0.400 g according to the iron content; - MODIFY the dispensing volume of the test solution from 2.00 mL to 10.00 mL; - ADJUST the cuvette 3 cm to 1 cm; - ADJUST the working curve range from (0 ~ 0.5) mg/100 mL to (0 ~ 1.5) mg/100 mL; - ADD the repeatability limits, supplementing quality assurance and control terms. This Part was proposed by AND shall be under the jurisdiction of the National Technical Committee for Standardization of Nonferrous Metals. Responsible drafting organization of this Part: Jinchuan Group Co., Ltd. Participated drafting organization of this Part: Guangzhou Nonferrous Metals Research Institute, Beijing General Research Institute of Mining and Metallurgy. The main drafters of this Part: Liu Haidong, Yu Shengjie, Lin Xiuying, Zhao Junfeng, Zhu Yuqiang. Methods for chemical analysis of nickel matte - Determination of iron content - Sulfosalicylic acid photometric method 1 Scope This Part specifies the method for determination of iron content in high nickel matte. This Part is applicable to the determination of iron content in high nickel matte. Measuring range: 0.5% ~ 7%. 2 Method summary The sample is decomposed with hydrochloric acid, nitric acid-potassium chlorate saturated solution. In the hydrochloric acid medium of pH1.5 ~ pH3.0, iron (III) and sulfosalicylic acid form a reddish-brown complex, whose absorbance is measured at the wavelength of 545 nm with a spectrophotometer. Calculate the iron content according to the standard curve method. 3 Reagents 3.1 Hydrochloric acid (ρ1.19 g/mL). 3.2 Hydrochloric acid (1 + 3). 3.3 Nitric acid (ρ1.42 g/mL). 3.4 Ammonia (1 + 3). 3.5 Nitric acid-potassium chlorate saturated solution: Dissolve potassium chlorate in nitric acid (3.3) until saturated. 3.6 Sulfosalicylic acid solution (100 g/L): Weigh 10 g of sulfosalicylic acid. Dissolve it in water and dilute it to 100 mL. Adjust it to about pH2 with ammonia water (3.4). 3.7 Iron standard solution: Weigh 0.1500 g of metallic iron (mass fraction of iron ≥ 99.9%). Place it in a 250 mL beaker. Add 20 mL of nitric acid (1 + 1). Heat to completely dissolve. Boil to drive out nitrogen oxides. Remove it. Cool to room temperature. Transfer to a 1000 mL volumetric flask. Use water to make the volume reach to the mark. 1 mL of this solution contains 0.15 mg of iron. ......

Similar standards: YS/T 252.6-2020  YS/T 252.7-2020  YS/T 252.8-2020  
Similar PDFs (Auto-delivered in 9 seconds): GB/T 3884.1-2012  GB/T 3884.2-2012  YS/T 521.2-2009