LaMotte SMART Spectro Spectrophotometer - Manual (Page 172)

NITRATE-NITROGEN–LOW RANGE
CADMIUM REDUCTION METHOD • CODE 3649-SC
QUANTITY CONTENTS CODE
2 x 60 mL * Mixed Acid Reagent *V-6278-H
5 g * Nitrate Reducing Reagent *V-6279-C
1 Spoon, 0.1 g, plastic 0699
1 Dispenser Cap 0692
*WARNING: Reagents marked with a * are considered to be potential health hazards. To view
or print a Material Safety Data Sheet (MSDS) for these reagents see MSDS CD or
www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
Nitrogen is essential for plant growth, but the presence of excessive amounts in
water supplies presents a major pollution problem. Nitrogen compounds may
enter water as nitrates or be converted to nitrates from agricultural fertilizers,
sewage, industrial and packing house wastes, drainage from livestock feeding
areas, farm manures and legumes. Nitrates in large amounts can cause “blue
babies” (methemoglobinemia) in infants less than six months of age. Nitrate
concentration is an important factor to be considered in livestock products,
where, in addition to causing methemoglobinemia, it is responsible for many
other problems. Nitrates in conjunction with phosphate stimulate the growth
of algae with all of the related difficulties associated with excessive algae
growth.
U.S. Public Health Service Drinking Water Standards state that 10 ppm
nitrate nitrogen should not be exceeded. To the sanitary and industrial
engineer, concentrations of less than 1 ppm are acceptable.
SMART SPECTRO TEST PROCEDURES 04.08 Nitrate-Nitrogen–LR 1/3