GB/T 1819.8-2017 in English
VALIDMethods for chemical analysis of tin concentrates―Part 8：Determination of zinc content―Flame atomic absorption spectrometric method
- Issued on:2017-09-29
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
《GB/T 1819.8-2017锡精矿化学分析方法 第8部分：锌量的测定 火焰原子吸收光谱法》由TC243（全国有色金属标准化技术委员会）归口，TC243SC2（全国有色金属标准化技术委员会重金属分会）执行，主管部门为中国有色金属工业协会。
Introduction
Interpretation of the National Standard of the People's Republic of China GB/T 1819.8—2017
This standard specifies the method for determining the zinc content in tin concentrate using flame atomic absorption spectrometry, which is applicable to samples with a content range of $0.005\% \sim 3.50\%$.
| Items | 2017 version requirements | 2004 version comparison |
|---|---|---|
| Measurement range | $0.005\% \sim 3.50\% | $0.005\% \sim 3.00\% |
| Characteristic concentration | No more than $0.014~\mu\mathrm{g/mL}$ | Same as above |
| Precision requirements | Standard deviation does not exceed $1.0\%$ and $0.5\% of the mean | Same requirements |
Overview of the determination method
Flame atomic absorption spectrometry measures the absorbance of zinc at a wavelength of $213.9~\mathrm{nm}$ by using an air-acetylene flame. The specific steps include sample decomposition, working curve drawing and result calculation.
Implementation suggestions
To ensure the accuracy of the determination, it is recommended to:
- Select instruments that meet the precision requirements and calibrate them regularly.
- Operators must undergo professional training and be familiar with standard operating procedures.
- Establish a quality control system, including blank tests and repeatability checks.
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