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 language | English (US) |
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Pages (from-to) | 931-937 |
Number of pages | 7 |
Journal | Limnology and Oceanography |
Volume | 17 |
Issue number | 6 |
DOIs |
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State | Published - Nov 1972 |
Externally published | Yes |
ASJC Scopus subject areas
- Oceanography
- Aquatic Science