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

S. W. HAGER; E. 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, E. L. ATLAS, L. I. GORDON, A. W. MANTYLA, P. K. PARK

Research output: Contribution to journal › Comment/debate › peer-review

25 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 - Nov 1972
Externally published	Yes

ASJC Scopus subject areas

Oceanography
Aquatic Science

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@article{119d9267ea05456fa9c30d8746a0b3c2,

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

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.",

author = "HAGER, {S. W.} and ATLAS, {E. L.} and GORDON, {L. I.} and MANTYLA, {A. W.} and PARK, {P. K.}",

year = "1972",

month = nov,

doi = "10.4319/lo.1972.17.6.0931",

language = "English (US)",

volume = "17",

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journal = "Limnology and Oceanography",

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AU - HAGER, S. W.

AU - ATLAS, E. L.

AU - GORDON, L. I.

AU - MANTYLA, A. W.

AU - PARK, P. K.

PY - 1972/11

Y1 - 1972/11

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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JO - Limnology and Oceanography

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

Abstract

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