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 happencolor 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, and particularly relates 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 exchanges of coastal ports, the pollution of the marine environment is becoming more and more serious, and the content of sulfide in the seawater is increasing year by year. In order to protect the marine environment, the analysis of sulfide in seawater has received more and more attention.

[0003] Regarding the analysis of sulfide in seawater, the national standard method (GB17378.4-1998, 19.1) adopts the methylene (base) blue spectrophotometry, but the standard method is a manual analysis method, sampling, sample injection and data processing are all Relying on manual operation, not only the operation is cumbersome, labor-intensive, but also easy ...

Examples

Embodiment Construction

[0024] 1. Preparation of standard samples

[0025] (1) Put Na 2 S is dissolved in deionized water and prepared as Na 2 S concentration 20mg / L stock solution;

[0026] (2) Put the stock solution 0, 50μL, 125μL, 250μL, 500μL, 750μL into a 25mL volumetric flask respectively, add seawater without sulfide to the marking line and mix evenly. In each standard sample, S 2- The concentrations are 0, 20μg / L, 50μg / L, 100μg / L, 200μg / L, 300μg / L.

[0027] 2. Reference solution R Participate Preparation

[0028] Slowly add concentrated sulfuric acid to the deionized water under stirring to prepare a sulfuric acid concentration of 9.0×10 -2 mol / L aqueous solution as reference liquid R Participate .

[0029] 3. Color developing liquid R 1 Preparation

[0030] Dissolve ferric chloride in concentrated hydrochloric acid, then add deionized water to prepare an aqueous solution with a mass percentage of ferric chloride of 0.6% and a volume percentage of hydrochloric acid of 1.0% as the color developing soluti...

Technical field

[0001] The invention belongs to a detection and analysis method for sulfide in water samples, and particularly relates 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 exchanges of coastal ports, the pollution of the marine environment is becoming more and more serious, and the content of sulfide in the seawater is increasing year by year. In order to protect the marine environment, the analysis of sulfide in seawater has received more and more attention.

[0003] Regarding the analysis of sulfide in seawater, the national standard method (GB17378.4-1998, 19.1) adopts the methylene (base) blue spectrophotometry, but the standard method is a manual analysis method, sampling, sample injection and data processing are all Relying on manual operation, not only the operation is cumbersome, labor-intensive, but also easy ...

Examples

Embodiment Construction

[0024] 1. Preparation of standard samples

[0025] (1) Put Na 2 S is dissolved in deionized water and prepared as Na 2 S concentration 20mg / L stock solution;

[0026] (2) Put the stock solution 0, 50μL, 125μL, 250μL, 500μL, 750μL into a 25mL volumetric flask respectively, add seawater without sulfide to the marking line and mix evenly. In each standard sample, S 2- The concentrations are 0, 20μg / L, 50μg / L, 100μg / L, 200μg / L, 300μg / L.

[0027] 2. Reference solution R Participate Preparation

[0028] Slowly add concentrated sulfuric acid to the deionized water under stirring to prepare a sulfuric acid concentration of 9.0×10 -2 mol / L aqueous solution as reference liquid R Participate .

[0029] 3. Color developing liquid R 1 Preparation

[0030] Dissolve ferric chloride in concentrated hydrochloric acid, then add deionized water to prepare an aqueous solution with a mass percentage of ferric chloride of 0.6% and a volume percentage of hydrochloric acid of 1.0% as the color developing soluti...

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