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关 键 词：H2S
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发布时间：2010-12-20
Hydrogen sulphide No.4D H2S Performance Measuring Range 0.2 to 200 ppm Sampling Hours 1 to 48 hours Detecting Limit 0.2 ppm (10 hours) Color Change White → Brown Reaction Principle H2S + Pb(CH3COO)2 → PbS + 2CH3COOH Coefficient of Variation 10% (for 10 to 200 ppm-hr) Shelf Life 3 Year Corrections for temperature & humidity Unnecessary Store the tubes at cool and dark place. Possible coexisting substances and their interferences (NOTE) Substance Concentration Interference Change color by itself Nitrogen dioxide 5 ppm - No Ammonia 25 ppm No No Chlorine 1 ppm No No sulphur dioxide 5 ppm No No Calibration gas generation Diffusion tube method TLV-TWA TLV-STEL Explosive range 10 ppm 15 ppm 4.0 to 44%
