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Application Range<br />
Determination of formic acid in water/waste water<br />
Dräger-Tube: Acetic Acid 5/a<br />
Measuring range:<br />
Number of Strokes (n): 10<br />
Typical Stroke Time:<br />
Measurement Time:<br />
Sample Volume:<br />
Color Change:<br />
Formic Acid 1 to 20 g/L<br />
Order No. 67 22 101<br />
1 to 20 g/L<br />
10 to 30 s<br />
approx. 200 s<br />
200 mL<br />
blue violet ä yellow<br />
Temperature Range: 5 to 25 °C<br />
pH-Measurement:<br />
necessary<br />
|331<br />
Information of Measurement<br />
Using sulfuric acid, the pH-value has to be<br />
adjusted to the value of 1.3.<br />
System Parameters (valid for pH 1.3)<br />
Measurement<br />
Range<br />
[g/L]<br />
Standard<br />
Deviation<br />
[%]<br />
Temperature<br />
[°C]<br />
Parameters<br />
B C<br />
1 to 20 25 5 to 25 0.487 1.607<br />
E<br />
Evaluation of Measurement<br />
Calculate formic acid concentration:<br />
Y [g/L] = A • B • (X [ppm] + C)<br />
Cross Sensitivity<br />
Acetic acid and propionic acid are indicated with higher<br />
sensitivity.<br />
D-13305-2010
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