GB/T 34162-2017 in English
VALIDNatural gas--Determination of arsenic content--Potassium permanganate sample method
- Issued on:2017-09-07
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 34162-2017天然气 砷含量的测定 高锰酸钾取样法》由TC244（全国天然气标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
1. Background and significance of standard formulation
As an important component of clean energy, the quality of natural gas is directly related to the safety and environmental protection of energy utilization. As a toxic and harmful element, the detection of arsenic content in natural gas is of great significance.
2. Technical principles and methods
This standard adopts the potassium permanganate solution absorption method to determine the arsenic content in natural gas. The specific steps include:
- Sample collection: natural gas is drawn from the pipeline through a stainless steel pipe and connected to the sampling container with a short-section rubber hose.
- Absorption device: use a glass sand absorber or a glass orifice absorber, and add 40 mL of 0.5% potassium permanganate solution.
- Sample treatment: filter the absorption liquid and make it constant, and then use inductively coupled plasma atomic emission spectrometer (ICP-OES) to determine the arsenic content.
3. Comparative analysis of standard frameworks
| Dimensions | Requirements of this standard | Comparison with other international/domestic standards |
|---|---|---|
| Scope of application | Applicable to the detection of samples with arsenic content ≥0.05 mg/m³ in natural gas. | It is consistent with the international standard ISO 17025 in methodology, but focuses more on the special requirements of the natural gas industry. |
| Instrument requirements | The inductively coupled plasma atomic emission spectrometer (ICP-OES) must meet specific performance indicators, such as the relative standard deviation of 10 consecutive measurements ≤3%. | It is consistent with ASTM D7668 in instrument accuracy requirements. |
| Operational procedures | Includes three main steps: sample collection, absorption treatment and laboratory analysis. | Similar to EN 16830 in sampling method, but more attention is paid to the details of the use of potassium permanganate solution. |
4. Implementation suggestions
Case analysis: Implementation suggestions for arsenic content detection in a natural gas field
- Sample collection stage: Strictly follow GB/T13609 to ensure the sealing and representativeness of the sampling container.
- Absorption treatment stage: Pay attention to the concentration control of potassium permanganate solution and the vacuum stripping operation of hydrocarbon substances in the solution.
- Laboratory analysis stage: It is recommended to use the standard curve method for quantitative analysis to ensure the preparation accuracy of the calibration solution.
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