HY/T 0346-2022Determination of seawater trace nitrate - Flow analysis, cadmium reduction, diazotization and spectrophotometric detection with a long path length flow cell (English PDF)

HY/T 0346-2022 (Determination of seawater trace nitrate - Flow analysis, cadmium reduction, diazotization and spectrophotometric detection with a long path length flow cell) is available as an English-translated PDF.

HY/T 0346-2022 — This document describes the method principle for the determination of trace nitrate in seawater by flow analysis-cadmium column reduction-diazo coupling-long path spectrophotometry. procedures, calculation and recording of results, specified reagents and materials, instruments and equipment, sample collection and storage, precision and accuracy, quality Technical requirements for quantity assurance and quality control, etc. This document applies to the determination of trace nitrates at the nanomole per liter (nmol/L) level in seawater.

The detection limit of this method is 6nmol/L, the lower limit of determination is 10nmol/L.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 9 pages — is available in the English PDF.

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