Responsible : S. HELIAS NUNIGE, O. GROSSO et T. MOUTIN										
										
sampling/storage : samples are directly analysed on board or poisoned with 50µl HgCl2 to final concentration at 20µg/L and stored for analyse at the return of the cruise										
										
method : Aminot A., Kérouel, R. 2007 Dosage automatique des nutriments dans les eaux marines : méthodes en flux continu. Ed. Ifremer, Méthodes d’analyse en milieu marin, 188p.										
										
Instrument Type: Nutrient Auto Analyser (colorimetric method) SEAL Analytical AA3 HR										
										
LQ	NO3	NO2	PO4	Si						
µmol/L	0,02	0,01	0,02	0,06						
										
The quantification limit (LQ) of an individual analytical procedure is the lowest amount of analyte in a sample which can be quantitatively determined with suitable precision and accuracy.										
LQ has been determined by analysing 10 times the same sample of surface seawater (poor in nutrients)										
LQ= 10*SD	in which SD is the standard deviation									
										
Values of the determination of LQ										
µmol/L	NO3	NO2	PO4	Si						
	0,022	0,007	0,022	0,090						
	0,021	0,006	0,020	0,083						
	0,021	0,006	0,019	0,105						
	0,019	0,006	0,018	0,096						
	0,019	0,005	0,017	0,093						
	0,019	0,007	0,022	0,097						
	0,017	0,007	0,021	0,092						
	0,021	0,007	0,021	0,088						
	0,022	0,006	0,019	0,098						
	0,019	0,007	0,019	0,092						
										
Mean	0,020	0,006	0,020	0,093						
SD	0,002	0,001	0,002	0,006						
CV	8,2%	11%	8,5%	6,5%						
LD 	0,005	0,002	0,005	0,018						
LQ	0,016	0,007	0,017	0,060						
										
										
										
										
update	07/10/2016