GB/T 34208-2017 in English
VALIDIron and steel--Determination of antimony and tin content--Inductively coupled plasma atomic emission spectrometric method
- Issued on:2017-09-07
- Implemented on:2018-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 34208-2017钢铁 锑、锡含量的测定 电感耦合等离子体原子发射光谱法》由TC183（全国钢标准化技术委员会）归口，TC183SC5（全国钢标准化技术委员会钢铁及合金化学成份测定分会）执行，主管部门为中国钢铁工业协会。
Introduction
Interpretation of GB/T 34208-2017 National Standard of the People's Republic of China
This standard specifies the method for determining the content of antimony and tin in steel by inductively coupled plasma atomic emission spectrometry (ICP-AES), which is applicable to carbon steel and low alloy steel with a chromium content of less than 1.50% and a nickel content of less than 2.00%. The following is a detailed interpretation of the standard.
Instruments and Equipment
| Analysis Line | Element | Wavelength(nm) | Main Interference Elements |
|---|---|---|---|
| 206.833 nm | Antimony(Sb) | Cr, Nb, Mo, W | |
| 217.581 nm | Sb | Ni, Nb, W | |
| 189.989 nm | Tin(Sn) | Al, Ti |
Reagents and Materials
Antimony Standard Solution: Prepared with high purity potassium antimony tartrate, the concentrations are 500 μg/mL and 10.0 μg/mL. It is recommended to use commercially available certified standard solutions.
Tin Standard Solution: Prepared with high purity tin, the concentrations are 500 μg/mL and 10.0 μg/mL. It is also recommended to use commercially available certified standard solutions to ensure accuracy.
Analysis Steps
- Sample Preparation: Weigh 0.50 g of sample, accurate to 0.1 mg. Dissolve in mixed acid (nitric acid and hydrochloric acid).
- Calibration Curve Plotting: Prepare a series of standard solutions with high purity iron, add antimony and tin standard solutions respectively, and make a calibration curve. The correlation coefficient is required to be greater than 0.995.
- Spectral measurement: Introduce the sample solution into ICP-AES, measure the spectral intensity of each analytical line, and deduct the blank test result.
- Interference correction: Correct the possible interference of coexisting elements and calculate their influence coefficient on the measured element.
- Data calculation: Calculate the mass fraction (ω_M) of antimony and tin in the sample based on the calibration curve and the net spectral intensity.
Precision Analysis
| Element | Content Range(%) | Repeatability Limit r | Reproducibility Limit R |
|---|---|---|---|
| Antimony (Sb) | 0.0020 ~ 0.12 | r = 0.00020 + 0.0673m | R = 0.00055 + 0.1143m |
| Tin (Sn) | 0.0020 ~ 0.13 | r = 0.00022 + 0.0317m | R = 0.00055 + 0.1245m |
Implementation suggestions
To ensure the accuracy of the measurement results, it is recommended to:
- Use simultaneous or sequential ICP-AES instruments, and give priority to analytical lines with high sensitivity and less interference.
- Regularly calibrate the instrument and monitor whether its performance indicators (such as resolution and stability) meet the requirements.
- In actual operation, pay attention to the effect of acid concentration and type on sample dissolution.
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