Mercaptan 0.5/a, 0.5 - 5 PPM, Part # 6728981, 10 Tests 

Application Range

Standard Measuring Range: 0.5 to 5 ppm

Number of Strokes n: 20

Time for Measurement: approx. 5 min.

Standard Deviation: ± 10 to 15 %

Color Change: white š yellow

Ambient Operating Conditions

Temperature: 10 to 40 °C

Absolute Humidity: 3 to 15 mg H2O / L

Reaction Principle

2 R-SH + Pd2+ š Pd(RS)2 + 2 H+

Cross Sensitivity

Higher molecular weight alkyl mercaptans (e.g. propyl- and butylmercaptans) are indicated with approximately the same sensitivity. 1,000 ppm ethylene, 2,000 ppm carbon monoxide and 200 ppm hydrogen sulfide do not affect the indication. Hydrogen sulfide discolors the pre-layer black.