Lovibond Maxi Direct - Page 191

189
MaxiDirect_2c 03/2010
1.1 Methods
Notes:
1. The tablets must be added in the correct sequence.
2. Chlorine and other oxidizing agents which react with DPD do not interfere with the test.
3. To avoid loss of Sulfide collect the sample carefully with a minimum of aeration. It is
essential to test the sample immediately after collection.
4. The sample temperature should be 20°C. A different temperature can lead to higher
or lower results.
5. Conversion:
H
2
S = mg/l S x 1.06
6.
S
H
2
S