TY - JOUR

T1 - A procedure for the simultaneous determination of Total N and Total P in freshwater using persulphate microwave digestion.

AU - Johnes, P. J.

AU - Heathwaite, A. Louise

N1 - A procedure for the simultaneous determination of Total N and Total P in freshwaters using persulphate microwave digestion. 1 cites: http://scholar.google.com/scholar?num=100&hl=en&lr=&cites=1260981972087475959

PY - 1992/10

Y1 - 1992/10

N2 - In the absence of a suitable method for routine analysis of large numbers of natural river water samples for organic nitrogen and phosphorus fractions, a new simultaneous digestion technique was developed, based on a standard persulphate digestion procedure. This allows rapid analysis of river, lake and groundwater samples from a range of environments for total nitrogen and phosphorus. The method was evaluated using a range of organic nitrogen and phosphorus structures tested at low, mid and high range concentrations from 2 to 50 mg l−1 nitrogen and 0.2 to 10 mg l−1 phosphorus. Mean recoveries for nitrogen ranged from 94.5% (2 mg l−1) to 92.7% (50 mg l−1) and for phosphorus were 98.2% (0.2 mg l−1) to 100.2% (10 mg l−1). The method is precise in its ability to reproduce results from replicate digestions, and robust in its ability to handle a variety of natural water samples in the pH range 5–8

AB - In the absence of a suitable method for routine analysis of large numbers of natural river water samples for organic nitrogen and phosphorus fractions, a new simultaneous digestion technique was developed, based on a standard persulphate digestion procedure. This allows rapid analysis of river, lake and groundwater samples from a range of environments for total nitrogen and phosphorus. The method was evaluated using a range of organic nitrogen and phosphorus structures tested at low, mid and high range concentrations from 2 to 50 mg l−1 nitrogen and 0.2 to 10 mg l−1 phosphorus. Mean recoveries for nitrogen ranged from 94.5% (2 mg l−1) to 92.7% (50 mg l−1) and for phosphorus were 98.2% (0.2 mg l−1) to 100.2% (10 mg l−1). The method is precise in its ability to reproduce results from replicate digestions, and robust in its ability to handle a variety of natural water samples in the pH range 5–8

KW - total nitrogen

KW - total phosphorus

KW - freshwater

KW - water quality

KW - simultaneous digestion

KW - persulphate oxidation

KW - microwave digestion unit

KW - autoanalyser

U2 - 10.1016/0043-1354(92)90122-K

DO - 10.1016/0043-1354(92)90122-K

M3 - Journal article

VL - 26

SP - 1281

EP - 1285

JO - Water Research

JF - Water Research

IS - 10

ER -