Hardness, total – udv – LaMotte SMART3 Colorimeter User Manual
Page 181
HARDNESS, TOTAL – UDV
UNIT DOSE VIALS • CODE 4309-J
QUANTITY
CONTENTS
CODE
1
Calcium Hardness Unit Dose Vials, 20 pouches
4309-J
Equipment needed but not supplied:
STANDARD ACCESSORY PACKAGE · CODE 1961
1
Package of 3 Vials (empty)
0156
1
Syringe, 3 mL, plastic
1184
1
Foil Storage Bag
9467
Or:
ADVANCED ACCESSORY PACKAGE · CODE 1962
1
Pipettor, 3mL
30528
1
Pipet Tip (0-5 mL)
30695
1
Cuvette Rack
31695
1
Package of 3 Vials (empty)
0156
1
Foil Storage Bag
9467
APPLICATION:
Drinking and surface waters; swimming pool water.
RANGE:
0–450 ppm as CaCO
3
Total Hardness
MDL:
10 ppm
METHOD:
Calcium and magnesium react in a strongly buffered
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.
SMART3 Test Procedures 11.10
HARDNESS, Total, UDV
Test P
rocedures