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Measuring rangę 1.0-15.0 mg/l Ca:

Pretreated sample (20 - 35 °C)	0.50 ml	Pipette into a test tubę.
Reagent Ca-1	5.0 ml	Add with pipette and mix.
Reagent Ca-2	4 drops¹⁾	Add and mix.
Reagent Ca-3	4 drops¹⁾	Add and mix.
Leave to stand for exactly 8 min (reaction time), then fili the sample into a 10-mm celi, and measure in the photometer.
¹⁾ Hołd the bottle vertically while adding the reagent!
Measuring rangę 5	-160 mg/l Ca:
Pretreated sample (20 - 35 °C)	0.10 ml	Pipette into a test tubę.
Reagent Ca-1	5.0 ml	Add with pipette and mix.
Reagent Ca-2	4 drops¹⁾	Add and mix.
Reagent Ca-3	4 drops¹⁾	Add and mix.
Leave to stand for exactly 8 min (reaction time), then fili the sample into the celi, and measure in the photometer.

¹⁾ Hołd the bottle vertically while adding the reagent!