GB/T 38394-2019 in English
VALIDCoal tar—Determination of sodium, calcium, magnesium and iron content—Inductively coupled plasma optical emission spectrometry
- Issued on:2019-12-31
- Implemented on:2020-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 38394-2019煤焦油 钠、钙、镁、铁含量的测定 电感耦合等离子体发射光谱法》由TC469（全国煤化工标准化技术委员会）归口，TC469SC3（全国煤化工标准化技术委员会炼焦化学分会）执行，主管部门为国家标准化管理委员会。
Introduction
1. Background and significance of the standard
GB/T 38394-2019 "Determination of sodium, calcium, magnesium and iron content in coal tar - Inductively coupled plasma optical emission spectrometry" is a standard proposed by the China Iron and Steel Association and managed by the National Coal Chemical Industry Standardization Technical Committee. This standard specifies the method of using inductively coupled plasma optical emission spectrometer (ICP-OES) to determine the content of sodium, calcium, magnesium and iron in coal tar, and is applicable to medium and low temperature coal tar and high temperature coal tar with a water content of less than 0.5%.
2. Comparative analysis of standard frameworks
| Standard dimensions | Scope of application | Determination method | Technical requirements |
|---|---|---|---|
| Sample processing | Determination of sodium, calcium, magnesium and iron contents in coal tar | Inductively coupled plasma optical emission spectrometry | High temperature ashing, acid dissolution |
| Instrument requirements | - | ICP-OES | Typical working conditions: 1400W power, auxiliary gas flow rate 1.0L/min |
| Data processing | - | Calibration curve method | Regression equation calculation, concentration range linearity verification |
3. Standard implementation suggestions
Laboratory conditions:
- Equipped with ICP-OES instruments and auxiliary equipment that meet the requirements (such as muffle furnace, electric hot plate, etc.).
- Ensure that the experimental water meets the GB/T 6682 level 2 and above standards.
- Possess high temperature ashing and acid dissolution processing capabilities.
Staff training:
- Operators must undergo professional training and be familiar with the operation and maintenance of ICP-OES instruments.
- Master the preparation method of standard solutions and the calibration curve drawing technology.
- Capable of handling abnormal situations (such as sample splashing, signal overload, etc.).
Data quality management:
- Perform reagent blank tests and result calculations in strict accordance with standards to ensure data accuracy.
- Regularly calibrate instruments and verify the precision of methods (repeatability limit r and reproducibility limit R).
- Record complete experimental data and operating procedures for easy traceability and review.
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