YSI 9300 Photometer - Manual (Page 58)

Separation of Copper Residuals
The direct-reading photometer is programmed for both free and total copper. Use
program Phot 10 Free Copper, then select the ‘Follow On’ option on screen to
continue test for program Phot 11 Total Copper.
Test Procedure
1 Fill test tube with sample to the 10 ml mark.
2 Add one Coppercol No 1 tablet, crush and mix to dissolve.
3 Select Phot 10 on photometer.
4 Take photometer reading in usual manner - see photometer instructions.
5 The result represents the free copper concentration as mg/l Cu. Stop the test
at this stage if only free copper determination is required.
6 If it is desired to measure chelated or total copper continue the test on the
same test portion. Select the ‘Follow On’ from screen options to continue the
test program.
7 Add one Coppercol No 2 tablet, crush and mix to dissolve.
8 Take photometer reading.
9 The result represents the Total Copper concentration as mg/l Cu.
10 The Chelated Copper concentration is obtained by subtracting the free
copper concentration from the total copper concentration :-
ie Chelated Copper = Total Copper - Free Copper
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