MT/T 277-1994 "Determination method of harmful gas hydrogen sulfide in mine air (detection tube method)"

"MT/T 277-1994 Method for the determination of hydrogen sulfide in mine air (Detection Tube Method) " stipulates a method for the determination of hydrogen sulfide concentration in mine air using a specific length hydrogen sulfide detection tube. This standard applies to the determination of hydrogen sulfide concentration in mine air, expressed in ppm (V/V). The detection principle is to indicate the chemical substances in the powder by carrier adsorption. When the mine air containing hydrogen sulfide passes through, the Color of the indicator powder will change, and the concentration of hydrogen sulfide will be determined according to the length of the Color change.

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