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

Atmospheric Sciences

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

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",

pages = "931--937",

journal = "Limnology and Oceanography",

issn = "0024-3590",

publisher = "American Society of Limnology and Oceanography Inc.",

number = "6",

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T1 - A COMPARISON AT SEA OF MANUAL AND AUTOANALYZER ANALYSES OF PHOSPHATE, NITRATE, AND SILICATE

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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