In situ nutrient salt automatic analysis device for seawater monitoring

Abstract

The invention discloses an in situ nutrient salt automatic analysis device for seawater monitoring. The device includes a first colorimetric structure (4.1) for ammonia nitrogen detection, a second colorimetric structure (4.2) for phosphate detection, a third colorimetric structure (4.3) for nitrite detection and a fourth colorimetric structure (4.4) for nitrate detection. A branch of a sample introduction and liquid discharge channel (1) is connected to a multiport valve (2), a syringe (3) is connected to the multiport valve (2), and the syringe and the multiport valve are in two-way setting. The device also includes a reagent unit, which comprises a plurality of reagent bags (5) connected to the multiport valve (2). Another branch of the sample introduction and liquid discharge channel (1) is connected to the fourth colorimetric structure (4.4), and the inlet of the fourth colorimetric structure (4.4) is equipped with a peristaltic pump (7). A xenon lamp (8) and a spectrometer (9) are arranged beside the fourth colorimetric structure (4.4), and the outlet of the fourth colorimetric structure (4.4) is connected to the sample introduction and liquid discharge channel (1). The in situ nutrient salt automatic analysis device provided by the invention has the advantages of easy cleaning and accurate detection.

Description

technical field [0001] The invention relates to the field of environmental monitoring, in particular to an in-situ nutrient automatic analysis device for seawater monitoring. Background technique [0002] Seawater nutrients are an important parameter for seawater quality monitoring. Determination of the concentration and distribution of nutrients in seawater is of great significance for early warning of red tides and research on marine biogeochemical cycles. [0003] The commonly used method for the determination of nutrients in seawater is based on the on-site sampling of the survey ship-laboratory measurement method. This method has defects such as poor real-time performance, waste of manpower, financial resources and time, and cannot obtain timely and continuous data. It cannot effectively reflect the long-term change trend of seawater. , analyze water quality changes, and warn marine environmental accidents. Nutrient salt automatic analyzers for in-situ monitoring are i...

AI Technical Summary

Problems solved by technology

General material properties are difficult to meet the needs of long-term online monitoring

Peristaltic pumps have large errors in the quantification of water samples and reagents, which can easily lead to large deviations in test results

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