GB/T 5195.7-2016 in English

VALID

Fluorspar―Determination of zinc content―Flame atomic absorption spectrophotometric method

Issued on:2016-12-13
Implemented on:2017-09-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
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Standard No:	GB/T 5195.7-2016
Document status:	VALID
Title in English:	Fluorspar―Determination of zinc content―Flame atomic absorption spectrophotometric method
Title in Chinese:	萤石锌含量的测定原子吸收光谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2016-12-13
Implemented on:	2017-09-01
ICS Classification:	73.080-Non-metalliferous minerals
Chinese Classification:	D52-Metallurgical auxiliary material ore
Professional Classification:	GB-National Standard
Related Keywords:	zinc content zinc content ― flame method atomic absorption spectrometry icp-oes xrf detection limit atomic absorption spectrometry atomic absorption
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《GB/T 5195.7-2016萤石锌含量的测定原子吸收光谱法》由TC183（全国钢标准化技术委员会）归口，TC183SC17（全国钢标准化技术委员会冶金非金属矿产品分会）执行，主管部门为中国钢铁工业协会。

Introduction

GB/T5195.7-2016 Standard Overview

This part of the standard specifies the method for determining the zinc content in fluorite using atomic absorption spectrometry, which is applicable to the detection of zinc content in the range of 0.020% to 1.0% by mass. This method decomposes the sample by mixed acid solution and measures the absorbance of zinc at a wavelength of 213.9 nm using an air-acetylene flame.

Comparison of Standard Frameworks

Project	GB/T5195.7-2016	ISO Reference Standard	American Society for Testing and Materials (ASTM)
Scope of Application	Determination of Zinc Content in Fluorite	General Metal Analysis	Metal Detection in Ores and Rocks
Principle of Method	Atomic Absorption Spectrometry	ICP-OES	XRF
Detection Limit	0.020%	0.01%	0.05%

Technical Points Interpretation

Reagents and Instrument Requirements

The standard clearly requires the use of analytically pure reagents and puts forward strict requirements on the quality level of water (secondary water and above). The main reagents include hydrochloric acid, sulfuric acid, hydrofluoric acid and perchloric acid, which must be prepared in strict proportion. In terms of instruments, the atomic absorption spectrometer must have an air-acetylene burner and be equipped with a zinc hollow cathode lamp.

Sample Preparation and Analysis Steps

The sample must be dried and finely ground to a particle size of less than 63μm before analysis. The sample is weighed in an amount of 0.20g±0.1mg. After decomposition by the mixed acid solution, it is transferred to a volumetric flask to make up the volume. The calibration curve uses a six-point correction method to ensure that the linear relationship meets the standard requirements.

Implementation Suggestions

Equipment Calibration: Calibrate the atomic absorption spectrometer regularly to ensure that the wavelength accuracy and sensitivity meet the requirements.
Reagent Management: Establish a reagent management system to ensure the accuracy of the concentration of reagents such as hydrochloric acid and sulfuric acid.
Quality Control: Add blank tests and repeated measurements during the analysis to ensure the reliability and accuracy of the data.
Staff Training: Conduct regular training for operators, focusing on strengthening the ability to prepare standard curves and analyze abnormal data.

Precision and Result Processing

According to the standard requirements, the precision of the determination of zinc content is determined by 7 laboratories jointly measuring 5 horizontal samples. When calculating the repeatability limit and reproducibility limit, it is necessary to note that the average of the two measured values is used as the basis, and the prerequisite of not more than 5% is met.

More samples: YD/T 3934-2021 DL/T 5154-2012 DL/T 368-2010

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