Nickel Tetracarbonyl, 0.1/a, 0.1 - 1 PPM, (CH19501)
Nickel Tetracarbonyl, 0.1/a, 0.1 - 1 PPM, Part # CH19501, 9 Tests
Standard Measuring Range: 0.1 to 1 ppm Discoloration compared to color standard. Number of Strokes n: 20
Time for Measurement: approx. 5 min
Standard Deviation: ± 50 %
Color Change: yellow pink
Ambient Operating Conditions
Temperature: 0 to 30 °C
Absolute Humidity: < 30 mg H2O / L
a) Ni(CO)4 + I2 NiI2 + 4 CO
b) NiI2 + Dimethylglyoxime pink colored complex
Iron pentacarbonyl is also indicated by a brownish discoloration, however, with less sensitivity. Measurement of nickel tetra carbonyl is not possible in the presence of hydrogen sulfide of sulfur dioxide, since the reading is suppressed. Such a disturbance can be recognised by decoloration of the indicating layer even before the reagent ampoule is opened.
After performing the required 20 pump strokes the reagent ampoule must be broken and the liquid carefully drawn onto the indicating layer using the pump.