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YS/T 953.1-2014 PDF English

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YS/T 953.1-2014: Methods for chemical analysis of fire smelting nickel substrate material - Part 1: Determination of nickel content - Dimethylglyoxime spectrophotometric method and dimethylglyoxime gravimetric method
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YS/T 953.1-2014160 Add to Cart Auto, 9 seconds. Methods for chemical analysis of fire smelting nickel substrate material - Part 1: Determination of nickel content - Dimethylglyoxime spectrophotometric method and dimethylglyoxime gravimetric method Valid

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GB/T 3884.2   GB/T 3884.1   YS/T 953.2   

YS/T 953.1-2014: Methods for chemical analysis of fire smelting nickel substrate material - Part 1: Determination of nickel content - Dimethylglyoxime spectrophotometric method and dimethylglyoxime gravimetric method



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YS NONFERROUS METAL INDUSTRY STANDARD ICS 77.120.40 H 13 Methods for chemical analysis of fire smelting nickel substrate material - Part 1.Determination of nickel content - Dimethylglyoxime spectrophotometric method and dimethylglyoxime gravimetric method Issued on. OCTOBER 14, 2014 Implemented on. APRIL 01, 2015 Issued by. Ministry of Industry and Information Technology of the PRC

Table of Contents

Foreword... 3 1 Scope... 5 2 Normative references... 5 3 Method 1 - Dimethylglyoxime spectrophotometric method... 5 4 Method 2 - Dimethylglyoxime gravimetric method... 9 5 Test report... 12

Foreword

YS/T 953 "Methods for chemical analysis of fire smelting nickel substrate material" is divided into 11 parts. - Part 1.Determination of nickel content - Dimethylglyoxime spectrophotometric method and dimethylglyoxime gravimetric method; - Part 2.Determination of silicon content - Molybdosilicate blue spectrophotometric method and perchloric acid dehydration gravimetric method; - Part 3.Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method; - Part 4.Determination of chrome content - Ammonium ferrous sulfate titration method; - Part 5.Determination of manganese content - Potassium periodate spectrophotometric method; - Part 6.Determination of cobalt content - 5-CI-PADAB spectrophotometric method and flame atomic absorption spectrometric method; - Part 7.Determination of copper content - BCO spectrophotometric method and flame atomic absorption spectrometric method; - Part 8.Determination of iron content - Titanium trichloride reduction- potassium dichromate titrimetric method; - Part 9.Determination of carbon and sulfur contents - Infrared absorption method after high frequency combustion; - Part 10.Determination of nickel, chromium, manganese, cobalt, copper and phosphorus contents - Inductively coupled plasma atomic emission spectrometric method; - Part 11.Determination of Lead, Arsenic, Cadmium and Mercury contents - Inductively coupled plasma-mass spectrometric method. This Part is Part 1 of YS/T 953.Method 2 is the arbitration method. This Part is drafted in accordance with the rules given in GB/T 1.1-2009. This Part shall be under the jurisdiction of National Technical Committee 243 on Nonferrous Metals of Standardization Administration of China (SAC/TC 243). Responsible drafting organization of this Part. Zhongbao Binhai Nickel Industry Co., Ltd. Drafting organizations of Method 1 of this Part. Zhongbao Binhai Nickel Industry Co., Ltd., Guangdong General Research Institute for Industrial Technology (Guangzhou Research Institute of Non-ferrous Metals). Participating drafting organizations of Method 1 of this Part. Northwest Institute for Non-ferrous Metal Research, Shanxi Taigang Stainless Steel Co., Ltd., Gejiu Research Institute of Metallurgy, Nantong Entry-Exit Inspection and Quarantine Bureau of the PRC. Main drafters of Method 1 of this Part. Zhou Jiannan, Liu Xianbin, Luo Hui, Dai Fengying, Zhang Yongjin, Sun Baolian, Zhou Kai, Zhao Shuying, Liu Aikun, Han Ning, Su Linjian, Wu Lianfen, Dou Huaizhi, Zhou Xiaolu. Drafting organization of Method 2 of this Part. Zhongbao Binhai Nickel Industry Co., Ltd. Participating drafting organizations of Method 2 of this Part. Shanxi Taigang Stainless Steel Co., Ltd., Henan Nashi Technology Co., Ltd., Guangdong General Research Institute for Industrial Technology (Guangzhou Research Institute of Non-ferrous Metals), Guangxi Yinyi Science and Technic Mine Metallurgy Co., Ltd. Main drafters of Method 2 of this Part. Zhou Jiannan, Liu Xianbin, Shen Yahong, Liu Aikun, Hu Jianchun, Zhang Xiaoqin, Zhang Junfang, Sun Huina, Dai Fengying, Sun Hongying, Cao Guohua, Cui Anfang. Methods for chemical analysis of fire smelting nickel substrate material - Part 1.Determination of nickel content - Dimethylglyoxime spectrophotometric method and dimethylglyoxime gravimetric method

1 Scope

This Part of YS/T 953 specifies the dimethylglyoxime spectrophotometric method and dimethylglyoxime gravimetric method for the determination of nickel content in the fire smelting nickel substrate material. This Part applies to the determination of nickel content in the fire smelting nickel substrate material. The determination range of Method 1 is 0.50%~5.00%. The determination range of Method 2 is 1.00%~25.00%.

2 Normative references

The following documents are indispensable for the application of this document. For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are applicable to this document. GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition

3 Method 1 - Dimethylglyoxime spectrophotometric

method 3.1 Method summary USE hydrochloric acid and nitric acid to dissolve the test portion. USE potassium sodium tartrate as a masking agent; in an alkaline medium of sodium hydroxide, use ammonium persulfate as an oxidant; nickel and dimethylglyoxime form a soluble wine-red complex. At the 460 nm wavelength of the spectrophotometer, measure the absorbance and calculate the nickel content. 3.2 Reagents Unless otherwise specified, only reagents confirmed to be analytically pure and distilled water or deionized water or water of equivalent purity are used in the analysis. 3.2.1 Hydrochloric acid (ρ=1.19 g/mL). 3.2.10 Nickel standard solution 3.2.10.1 Nickel standard solution (1.0 mg/mL). WEIGH 0.5000 g of metallic nickel (wNi≥99.99%) and place it in a 250 mL beaker; ADD 20 mL of nitric acid solution (3.2.2) along the wall of the beaker; COVER the watch glass; HEAT it to dissolve; REMOVE and cool to room temperature; TRANSFER to a 500 mL volumetric flask; USE water to dilute to the mark and mix well. 3.4.2 Number of determinations Perform two determinations independently and take the average. 3.4.3 Blank test WEIGH 0.090 g of pure iron (wNi≤0.005%); do a blank test along with the test portion. 3.4.4 Determination 3.4.4.1 Dissolution of test portion PLACE the test portion (3.4.1) in a 250 mL polytetrafluoroethylene beaker; ADD 10 mL of hydrochloric acid (3.2.1), 10 mL of nitric acid (3.2.2); HEAT at low temperature to almost no reaction; then add 3~5 drops of hydrofluoric acid (3.2.3) in portions until completely dissolved. ADD 2 mL of perchloric acid (3.2.4); 3.4.5 Drawing of working curve PIPETTE 0 mL, 0.50 mL, 1.00 mL, 2.00 mL, 3.00 mL, 4.00 mL, 5.00 mL of nickel standard solution (3.2.10.2) respectively; PLACE them in seven 100 mL volumetric flasks. ADD 10 mL of iron blank solution (3.2.11); prepare the color developing solution according to step 3.4.4.2; USE the standard color developing solution without nickel as the reference; MEASURE the absorbance. USE the mass of nickel as the abscissa and the absorbance as the ordinate; DRAW a working curve. 3.5 Calculation of analysis results The nickel content is calculated by the mass fraction wNi of nickel. The value is expressed in %, calculated according to formula (1). 3.6 Precision 3.6.1 Repeatability For the measured values of two independent test results obtained under repeatability conditions, within the average range given below, the absolute difference between the two test results does not exceed the repeatability limit (r). Exceeding the repeatability limit (r) does not exceed 5%. The repeatability limit (r) is obtained by linear interpolation method according to the data in Table 1.

4 Method 2 - Dimethylglyoxime gravimetric method

4.1 Method summary USE a mixed acid of hydrochloric acid and nitric acid to decompose the test portion. ADD a small amount of hydrofluoric acid and emit perchloric acid fume. In the ammoniacal medium of tartrate, use dimethylglyoxime ethanol solution to precipitate nickel. The precipitate is dried at 145 °C to a constant weight, weighed. Calculate the nickel content. 4.2 Reagents Unless otherwise specified, only reagents confirmed to be analytically pure and distilled water or deionized water or water of equivalent purity are used in the analysis. 4.3 Samples TAKE and prepare samples according to GB/T 20066 or appropriate national or industrial standards. 4.4 Analytical procedures 4.4.1 Mass of test portion According to Table 3, weigh the sample (4.3), accurate to 0.0001 g. 4.4.2 Number of determinations Perform two determinations independently and take the average. 4.4.3 Blank test Do a blank test along with the test portion. 4.4.4 Determination 4.6.2 Reproducibility For the measured values of two independent test results obtained under reproducibility conditions, within the average range given below, the absolute difference between the two test results does not exceed the reproducibility limit (R). Exceeding the reproducibility limit (R) does not exceed 5%. The reproducibility limit (R) is obtained by linear interpolation method according to the data in Table 5.

5 Test report

This clause specifies the content to be included in the test report. At least the following shall be given. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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