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关 键 词：Ammonia
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发布时间：2010-12-20
Ammonia No.3D NH3 Performance Measuring Range 2.5 to 1000 ppm Sampling Hours 0.5 to10 hours Detecting Limit 0.5 ppm (10 hours) Color Change Purple → Yellow Reaction Principle 2NH3 + H2SO4 → (NH4)2SO4 Coefficient of Variation 10% (for 25 to 500 ppm-hr) Shelf Life 3 Year Corrections for temperature & humidity Temperature correction is necessary Store the tubes at cool and dark place. Possible coexisting substances and their interferences (NOTE) Substance Interference Change colour by itself to Amines, Hydrazine + Yellow Aromatic amines No No Other substance measurable with this detector tube Substance Correction Factor Sampling Time Measuring Range Dimethylamine 0.75 0.5 to 10 hours 1.9 to 750 ppm N,N-Dimethylethylamine 1.6 0.5 to 10 hours 4 to 1600 ppm Hydrazine 0.65 0.5 to 10 hours 1.6 to 650 ppm Triethylamine 2.1 0.5 to 10 hours 5.3 to 2100 ppm Calibration gas generation Diffusion tube method TLV-TWA TLV-STEL Explosive range 25 ppm 35 ppm 15 to 28%
