Table 4.

Relative standard uncertainty on nutrients mass fraction (SALT-1). Comparing different approaches for the evaluation of the characterization uncertainty component (u_char). Phosphate and silicate were measured by photometry, nitrate by GC−MS

Analyte	Uncertainty propagation	Monte Carlo	RSD	n
Phosphate	0.53%	0.35%	0.63%	31
Silicate	1.10%	0.84%	1.6%	31
Nitrate	0.95%	N/A	0.81%	26

Uncertainty propagation: obtained applying the law of uncertainty propagation [55] (Paragraphs S1.9 and S1.11); Monte Carlo: uncertainty obtained using a Monte Carlo simulation (Paragraphs S1.10). RSD relative standard deviation from multiple measurements; n number of measurements