A COMPARISON AT SEA OF MANUAL AND AUTOANALYZER ANALYSES OF PHOSPHATE, NITRATE, AND SILICATE

S. W. HAGER; Elliot L Atlas; L. I. GORDON; A. W. MANTYLA; P. K. PARK

doi:10.4319/lo.1972.17.6.0931

A COMPARISON AT SEA OF MANUAL AND AUTOANALYZER ANALYSES OF PHOSPHATE, NITRATE, AND SILICATE

S. W. HAGER, Elliot L Atlas, L. I. GORDON, A. W. MANTYLA, P. K. PARK

Research output: Contribution to journal › Comment/debate

22 Scopus citations

Abstract

A shipboard intercalibration of nutrient analyses performed using a Technicon Auto‐Analyzer (AA) and manually, using a Beckman model DU spectrophotometer, yielded the following relationships ( in µM): PO_4(AA) = (0.985 ± 0.009) PO_4(man) + (0.038 ± 0.018), R = 0.9983; NO_3(AA) = (0.974 ± 0.008) NO_3(man) − (0.399 ± 0.193), R = 0.9972; SiO_2(AA) = (1.008 ± 0.006) SiO_2(man) − (0.194 ± 0.272), R = 0.9991; where R is the correlation coefficient, and the number immediately following ± is the standard deviation. Both AA and manual methods give comparable precision, ±1%, at present and no significant systematic discrepancies exist between the two technologies for phosphate and silicate analyses. A small discrepancy was found in the nitrate work.

Original language	English (US)
Pages (from-to)	931-937
Number of pages	7
Journal	Limnology and Oceanography
Volume	17
Issue number	6
DOIs	https://doi.org/10.4319/lo.1972.17.6.0931
State	Published - 1972
Externally published	Yes

ASJC Scopus subject areas

Oceanography
Aquatic Science

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HAGER, S. W., Atlas, E. L., GORDON, L. I., MANTYLA, A. W., & PARK, P. K. (1972). A COMPARISON AT SEA OF MANUAL AND AUTOANALYZER ANALYSES OF PHOSPHATE, NITRATE, AND SILICATE. Limnology and Oceanography, 17(6), 931-937. https://doi.org/10.4319/lo.1972.17.6.0931

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abstract = "A shipboard intercalibration of nutrient analyses performed using a Technicon Auto‐Analyzer (AA) and manually, using a Beckman model DU spectrophotometer, yielded the following relationships ( in µM): PO4(AA) = (0.985 ± 0.009) PO4(man) + (0.038 ± 0.018), R = 0.9983; NO3(AA) = (0.974 ± 0.008) NO3(man) − (0.399 ± 0.193), R = 0.9972; SiO2(AA) = (1.008 ± 0.006) SiO2(man) − (0.194 ± 0.272), R = 0.9991; where R is the correlation coefficient, and the number immediately following ± is the standard deviation. Both AA and manual methods give comparable precision, ±1%, at present and no significant systematic discrepancies exist between the two technologies for phosphate and silicate analyses. A small discrepancy was found in the nitrate work.",

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year = "1972",

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AU - HAGER, S. W.

AU - Atlas, Elliot L

AU - GORDON, L. I.

AU - MANTYLA, A. W.

AU - PARK, P. K.

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N2 - A shipboard intercalibration of nutrient analyses performed using a Technicon Auto‐Analyzer (AA) and manually, using a Beckman model DU spectrophotometer, yielded the following relationships ( in µM): PO4(AA) = (0.985 ± 0.009) PO4(man) + (0.038 ± 0.018), R = 0.9983; NO3(AA) = (0.974 ± 0.008) NO3(man) − (0.399 ± 0.193), R = 0.9972; SiO2(AA) = (1.008 ± 0.006) SiO2(man) − (0.194 ± 0.272), R = 0.9991; where R is the correlation coefficient, and the number immediately following ± is the standard deviation. Both AA and manual methods give comparable precision, ±1%, at present and no significant systematic discrepancies exist between the two technologies for phosphate and silicate analyses. A small discrepancy was found in the nitrate work.

AB - A shipboard intercalibration of nutrient analyses performed using a Technicon Auto‐Analyzer (AA) and manually, using a Beckman model DU spectrophotometer, yielded the following relationships ( in µM): PO4(AA) = (0.985 ± 0.009) PO4(man) + (0.038 ± 0.018), R = 0.9983; NO3(AA) = (0.974 ± 0.008) NO3(man) − (0.399 ± 0.193), R = 0.9972; SiO2(AA) = (1.008 ± 0.006) SiO2(man) − (0.194 ± 0.272), R = 0.9991; where R is the correlation coefficient, and the number immediately following ± is the standard deviation. Both AA and manual methods give comparable precision, ±1%, at present and no significant systematic discrepancies exist between the two technologies for phosphate and silicate analyses. A small discrepancy was found in the nitrate work.

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