Test Procedures
APPLICATION:
Drinking and surface waters; swimming pool water.
RANGE:
10–500 as CaCO
3
Total Hardness
MDL:
10 ppm
METHOD:
Calcium and magnesium react in a strongly buff ered
medium with an indicator to develop a pale purple color in
proportion to the concentration.
SAMPLE HANDLING &
PRESERVATION:
Samples should be analyzed as soon as possible after
collection. If storage is necessary, add 0.5 mL of 20 %
hydrochloric acid per 100 mL of sample. However, the added
acid will have to be neutralized with NaOH before testing.
INTERFERENCES:
Heavy metals will interfere.
HARDNESS
, TOTAL-UDV
SMART Spectro 2 Test Procedures 05.02.16
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