Valid

YS/T 252.2-2007Methods for chemical analysis of nickel matte. Determination of iron content. Sulfosalicylic acid phototmetric method (English PDF)

高镍锍化学分析方法铁量的测定磺基水杨酸光度法

Preview PDF

This is a limited preview

Buy now to download the full PDF (8 pages)

Need quotation for your management?

Get a formal quotation for YS/T 252.2-2007 in 30 minutes.

Issued by

National Development and Reform Commission of PRC

Level / Type

National · Recommended

Issue date

April 13, 2007

Implementation date

October 1, 2007

Scope

YS/T 252.2-2007 is the English-translated version of 高镍锍化学分析方法铁量的测定磺基水杨酸光度法.

YS/T 252.2-2007 — 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%.

Found what you need?

Document preview — YS/T 252.2-2007

National Standard of the People's Republic of China

ICS: 77.120.40
Classification: H 13

Issued by: National Development and Reform Commission of PRC

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.

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 (rho1.19 g/mL).

3.2 Hydrochloric acid (1 + 3).

3.3 Nitric acid (rho1.42 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.

......

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 8 pages — is available in the English PDF.

How to Download YS/T 252.2-2007

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.