GB/T 1819.14-2017 in English
VALIDMethods for chemical analysis of tin concentrates- Part 14:Determination of copper content- Flame atomic absorption spectrometry
- Issued on:2017-09-29
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$68.00
《GB/T 1819.14-2017锡精矿化学分析方法 第14部分：铜量的测定 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
GB/T 1819.14-2017 Standard Background and Technical Evolution
GB/T 1819 "Chemical Analysis Methods for Tin Concentrates" is divided into 21 parts. Part 14 of this interpretation is specifically for the determination of copper content. The standard was first published in 2006 and revised in 2017, mainly updating the precision requirements and adding test report clauses. The new version introduces stricter quality control measures to ensure the accuracy and reliability of the analysis results.
Comparison of standard frameworks
| Standard items | GB/T 1819.14-2006 | GB/T 1819.14-2017 |
|---|---|---|
| Precision requirements | Specific values not specified | New precision indicators (such as repeatability limit r and reproducibility limit R) |
| Linearity of working curve | No clear regulations | Requirement that the absorbance difference ratio between the highest and lowest segments is not less than 0.70 |
| Blank test requirements | Specific operations not specified | It is stipulated that a blank test must be carried out along with the sample |
Requirements for reagents and instruments
Atomic absorption spectrometer is the core instrument of this standard and must be equipped with a copper hollow cathode lamp. According to the standard requirements, the instrument must meet the following indicators: characteristic concentration ≤ 0.03μg/mL, the standard deviation of the absorbance of the highest concentration standard solution does not exceed 1.0% of the average value, and the lowest concentration does not exceed 0.5%.
Flame atomic absorption spectrometry uses an air-acetylene burner, and the working conditions need to be optimized to measure the absorbance of copper at a wavelength of 324.7nm.
Implementation recommendations
- The laboratory should calibrate the instrument regularly and ensure that the purity of the reagents meets the requirements, especially when preparing the standard solution, the concentration accuracy must be strictly controlled.
- During sample processing, if you encounter a sample with a high silica content, it is recommended to add ammonium fluoride to improve the dissolution efficiency.
- The working curve should include at least five different concentration points, and its linear relationship should be checked regularly to see if it meets the requirements.
Precision and quality control
| Copper content range (%) | Repeatability limit r (%) | Reproducibility limit R (%) |
|---|---|---|
| 0.013~2.14 | r：0.002~0.09 | R：0.03~0.12 |
Importance of test report
A complete test report is the key to ensure the traceability of analysis results. It is recommended that the report content include: sample information, standard basis, analysis data, method differences and abnormal phenomenon records.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 19204-2020 in English
General characteristics of liquefied natural gas
2020-06-02
