Mercaptan 0.1/a, 0.1 - 25 PPM, Part # 8103281, 10 Tests 

Application Range

Standard Measuring Range: 0.1 to 2.5 ppm / 3 to 15 ppm

Number of Strokes n: 10 / 2

Time for Measurement: approx. 3 min / approx. 40 s

Standard Deviation: ± 10 to 15 %

Color Change: yellow š pink

Ambient Operating Conditions

Temperature: 5 to 40 °C

Absolute Humidity: 2 to 40 mg H2O / L

Reaction Principle

2 R-SH + Hg Cl2 š Hg(CH3S)2 + 2 HCl HCl + pH-indicator š reddish reaction product

Cross Sensitivity

Propyl mercaptan and n-butyl-mercaptan are indicated, but with different sensitivities. 4 ppm ethylene, 30 ppm CO, 10 ppm tetrahydrothiophene and 100 ppm hydrogen sulfide do not affect the indication. Hydrogen sulfide changes the pre-layer to black.