Background nutrient salt concentration determination of artificial and aged natural seawaters used in seawater nutrient analysis
Nutrient assay is essential in the routine oceanographic surveys.The nutrients of seawater are determined on a continuous flow analyzer usually requires artificial seawater or aged low-nutrient natu-ral seawater as the basal solution of standard calibration and the rinsing solution of the assaying system when seawater sample is changed.In this study,the concentrations of components(phosphate,nitrite,nitrate,ammonia nitrogen and silicate)in Sigma,Aladdin and Sinopharm sodium chloride(GR grade)solutions and aged West Pacific seawater were determined.The results showed that the concentrations of nitrite,nitrate,ammonia nitrogen and silicate varied in the three commercial sodium chloride salt so-lutions except phosphate.In contrast,the concentration of silicate was relatively high and trace amount of nitrite was found while the other three nutrients were not detectable in the aged West Pacific seawa-ter.
NETL
NSTL
万方数据
