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334| Measurement of Contaminants in Liquids<br />
Hydrogen Sulfide 50 to 500 µg/L<br />
Order No. 81 01 461<br />
Application Range<br />
Determination of hydrogen sulfide (sum of sulfide) in water/waste<br />
water<br />
Dräger-Tube:<br />
Hydrogen Sulfide 0.2/a<br />
Measuring range:<br />
50 to 500 mg/L<br />
Number of Strokes (n): 5<br />
Typical Stroke Time:<br />
50 to 80 s<br />
Measurement Time:<br />
approx. 325 s<br />
Sample Volume:<br />
200 mL<br />
Color Change:<br />
white ä pale brown<br />
Temperature Range: 3 to 30 °C<br />
pH-Measurement:<br />
necessary<br />
Information of Measurement<br />
Using acetic acid or sodium hydroxide solution, the pH-value has to<br />
be adjusted to the value of 7.3 - 7.4 (K=1)<br />
System Parameters (valid for pH 7.3 - 7.4)<br />
Measurement<br />
Range<br />
[µg/L]<br />
Standard<br />
Deviation<br />
[%]<br />
Temperature<br />
[°C]<br />
Parameters<br />
B C<br />
50 to 500 30 3 to 7 72 0.2<br />
8 to 13 63 0.2<br />
14 to 30 57 0.2<br />
Evaluation of Measurement<br />
Calculate hydrogen sulfide concentration:<br />
Y [µg/L] = A • B • (K •X [ppm] + C)<br />
ST-132-2001
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