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 journalComment/debate

21 Citations (Scopus)

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.

Original languageEnglish (US)
Pages (from-to)931-937
Number of pages7
JournalLimnology and Oceanography
Volume17
Issue number6
DOIs
StatePublished - 1972
Externally publishedYes

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silicates
silicate
nitrates
phosphate
phosphates
nitrate
nutrient
spectrophotometers
nutrients
comparison
method
sea
methodology

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science

Cite this

A COMPARISON AT SEA OF MANUAL AND AUTOANALYZER ANALYSES OF PHOSPHATE, NITRATE, AND SILICATE. / HAGER, S. W.; Atlas, Elliot L; GORDON, L. I.; MANTYLA, A. W.; PARK, P. K.

In: Limnology and Oceanography, Vol. 17, No. 6, 1972, p. 931-937.

Research output: Contribution to journalComment/debate

HAGER, S. W. ; Atlas, Elliot L ; GORDON, L. I. ; MANTYLA, A. W. ; PARK, P. K. / A COMPARISON AT SEA OF MANUAL AND AUTOANALYZER ANALYSES OF PHOSPHATE, NITRATE, AND SILICATE. In: Limnology and Oceanography. 1972 ; Vol. 17, No. 6. pp. 931-937.
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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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