National standard test method for hydrogen sulfide, gas leak detector​

Here are the national standard methods for detecting hydrogen sulfide (H₂S) in China:

1. Gas Chromatography

• Standard: GB/T 16489-1996

• Principle: Analyzes the gas sample by separating and quantifying hydrogen sulfide components using a gas chromatograph, offering high sensitivity and accuracy.

2. Chemiluminescence Method

• Standard: GB/T 16297-1996

• Principle: Hydrogen sulfide reacts with specific reagents to produce chemiluminescence, with intensity measurement used to determine concentration.

3. Electrochemical Sensor Method

• Standard: GB/T 18204.26-2013

• Principle: Measures the concentration of hydrogen sulfide in the air using electrochemical sensors, suitable for rapid on-site detection.

4. Spectrophotometry

• Standard: GB/T 14699.4-1994

• Principle: Measures light absorption at specific wavelengths using a spectrophotometer to calculate the concentration of hydrogen sulfide.

5. Gas Detection Tube Method

• Standard: GB/T 21232-2007

• Principle: Uses specialized gas detection tubes, where the color change of the tube indicates the concentration of hydrogen sulfide as the gas passes through.

Important Notes

• Equipment Calibration: Ensure all instruments are calibrated properly before testing to guarantee accuracy.

• Safety Precautions: Implement appropriate safety measures during hydrogen sulfide detection to prevent potential poisoning risks.

These national standard methods provide various options suitable for different detection needs and environments.

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