Automatic analysis method for seawater sulfide

Abstract

The method of automated analysis of sulfide in the sea water, type sample or sample S enters into color development flow path I to mix with color development R1 by sample flow path, the mixture of shaping enters analysis detection flow path to mix with contrastive fluid R enter into optics low through cell, bringing mapped baseline; color development R2 enters analysis detection flow path II by color development flow path, to mix the type sample or sample S of entering analysis detection flow path and the mixture of color development R1 together under driving the contrastive fluid R and happen color reaction, the mixture of containing coloring matter renters into optics low through cell, bringing mapped spectrogram; taking to compare sample spectrogram of mapping with standard spectrogram, can work out the sulfide content. The contrastive fluid R is the dilute sulfuric acid liquor, color development R1 is the ferric chloride hyphen hydrochloric acid water liquor, color development R2 is the double amino-dimethylaminopropionic acid two hydrochloride hyphen hydrochloric acid water liquor. Analyzing the sulfide in the sea water can be used to remove disturb of the change of seawater salinity.

Description

technical field [0001] The invention belongs to a detection and analysis method for sulfide in water samples, in particular to an automatic analysis method for sulfide in seawater. Background technique [0002] With the development of marine resources, the development of coastal cities and production, and the frequent trade between coastal ports, the pollution of the marine environment is becoming more and more serious, and the content of sulfide in seawater is increasing year by year. In order to protect the marine environment, the analysis of sulfide in seawater has been paid more and more attention. [0003] Regarding the analysis of sulfide in seawater, what the national standard method (GB17378.4-1998, 19.1) adopted is the methylene (base) blue spectrophotometric method, but this standard method is a manual analysis method, sampling, sample introduction and data processing are all Relying on manual operation is not only cumbersome and labor-intensive, but also easily i...

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Problems solved by technology

[0003] Regarding the analysis of sulfide in seawater, what the national standard method (GB17378.4-1998, 19.1) adopted is the methylene (base) blue spectrophotometric method, but this standard method is a manual analysis method, sampling, sample introduction and data processing are all Relying on manual operation is not only cumbersome and labor-intensive, but also easy to introduce human error

[0004] "Chemical Research and Application" discloses a method of "determination of sulfur ions in water by flow injection spectrophotometry" (Chemical Research and Application, Volume 16, No. 6, P843-845, Zhao Ting, etc.), which combines The combination of methylene blue spectrophotometry and flow injection analysis method is used to detect sulfide in tannery industrial wastewater. Compared with manual operation, although the operation is simplified and the detection speed is improved, the linear range is 1-25mg / L. The sensitivity is low, and it is difficult to overcome the interference caused by the change of seawater salinity

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