LaMotte SMART3 Colorimeter - Manual (Page 215)

NITRATE - UDV
ZINC REDUCTION METHOD-UNIT DOSE VIALS •CODE
4321-J
QUANTITY CONTENTS CODE
50 Nitrate UDV 4321-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
Nitrogen is essential for plant growth, but excessive amounts in water supplies can
result in nutrient pollution. Nitrates may enter the water from leaves or debris but
other sources of nitrates include well water supplies, localized spraying of lawn
or crop fertilizers, acid rain, bird droppings and bather wastes, urine and sweat.
Nitrates, in conjunction with phosphate, stimulate the growth of algae creating water
quality problems. Pools that are properly maintained usually do not have unexpected
diffi culty controlling algae, even in the presence of low levels of nitrates. Higher
levels of nitrates can make algae control more diffi cult and increase the amount of
chlorine required to maintain satisfactory control of algae. The only practical way to
remove nitrates is to drain the water. Nitrates also cause problems in drinking water.
Large amounts can cause “blue baby syndrome” (methemoglobenemia) in infants in
less than 6 months of age and other health problems.
SMART3 Test Procedures 1.11 NITRATE, UDV
Test P
rocedures