YSI 9300 Photometer - Manual (Page 99)

Sample Collection
To prevent loss of sulphide collect the sample carefully with a minimum of
agitation or aeration. Test the sample as soon as possible after collection.
Test Procedure
1 Fill test tube with sample to the 10 ml mark.
2 Add one Sulphide No 1 tablet and one Sulfide No 2 tablet. Crush and mix
gently to dissolve the tablets. Gentle mixing is essential to avoid loss of
sulphide.
3 Stand for 10 minutes to allow full color development.
4 Select Phot 33 on photometer.
5 Take photometer reading in usual manner (see photometer instructions).
6 The result is displayed as mg/l S.
To convert from mg/l S to mg/l H
2
S - multiply result by 1.06
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