Automatic determination of ppB levels of ammonia, nitrate plus nitrite, and phosphate in water in the presence of added mercury(II) chloride

Journal Article · Sun Jan 01 04:00:00 EST 1978 · J. Environ. Qual.; (United States)

DOI:https://doi.org/10.2134/jeq1978.00472425000700010028x· OSTI ID:6642158

Skjemstad, J O; Reeve, R

Three automated procedures are reported for the simulataneous determination of ammonia, nitrate plus nitrite, and phosphate in water. The ammonia determination is based on the salicylate-dichloroisocyanurate reaction in the presence of nitroprusside preceded by in-line distillation. Nitrate plus nitrite is estimated by using an in-line copperized cadmium reductor, diazotizing the nitrite with sulphanilamide, and coupling with N-1-naphthylethylenediamine. Phosphate is estimated by reaction with molybdate and reduction to molybdenum blue with ferrous ammonium sulphate. Mercury (II) chloride used as a preservative does not interfere with the methods and good precision at ppB levels can be obtained.

• Research Organization: Commonwealth Scientific and Industrial Research Organization, St. Lucia, Australia
• OSTI ID: 6642158
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 7:1; ISSN JEVQA
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AMMONIA
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DIAZOTIZATION
DISTILLATION
ECOLOGICAL CONCENTRATION
HALIDES
HALOGEN COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
MEASURING METHODS
MERCURY CHLORIDES
MERCURY COMPOUNDS
MERCURY HALIDES
NITRATES
NITRITES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
SEPARATION PROCESSES
WATER