)
SO_DYFAMED Time Series - 1991-> ... |
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JC. MARTY : head of mission and project leader |
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NUTRIENTS : MD. PIZAY, C. HENDRICKX |
(get
data set excel file : )
Analysis of nutrients |
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Samples
for nutrient analysis were collected from Niskin bottles opf the CTD
Rosette in polyethylene bottles. From the beginning of the program
to December 1994, samples were stored in the dark at 4°C and
analyzed within 2 days. Since 1995, the samples were immediately
frozen on board and usually analyzed within 15 days. There was no
noticeable difference between data obtained after the two types of
storage of the samples; this was monitored during two months during
which the two protocols were used simultaneously. The samples were
analyzed for nitrate, nitrite, phosphate and silicate using standard
automated colorimetric methods (Tréguer and Le Corre, 1975).
Analytical precision for these measurements was approximately 0.05
µmole kg-1.
Tréguer, P., Le Corre, P., 1975.Utilisation de l’Autoanalyseur II Technicon. Manuel d’analyses des sels nutritifs dans l’eau de mer, 2ème édition. Laboratoire d’Océanographie chimique, Université de Bretagne Occidentale, France, 110p.
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FIGURES |
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