Method for detecting mercury and arsenic in marine sediments

A marine sediment and detection method technology, which is applied in the detection field of mercury and arsenic in marine sediment, can solve the problems of tedious, laborious, time-consuming, etc., and achieve the effect of improving work efficiency and reducing pretreatment and detection steps

Inactive Publication Date: 2019-05-21
GUANGDONG INST OF ANALYSIS CHINA NAT ANALYTICAL CENT GUANGZHOU
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Problems solved by technology

Although the above methods have been applied to mercury and arsenic in marine sediments, they are time-consuming, laborious and cumbersome.

Method used

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  • Method for detecting mercury and arsenic in marine sediments
  • Method for detecting mercury and arsenic in marine sediments
  • Method for detecting mercury and arsenic in marine sediments

Examples

Experimental program
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Embodiment 1

[0027] A method for detecting mercury and arsenic in marine sediments, comprising the following steps:

[0028] (1) Preparation of mixed standard solution: prepare 100 μg / L mercury standard solution with concentration of 1000 μg / mL mercury standard solution with 5% hydrochloric acid; Prepare 1000μg / L arsenic standard solution with 5% hydrochloric acid; measure 2.00mL each of the prepared mercury standard solution and arsenic standard solution into a 100mL volumetric flask, then add 5mL of 5% (W / V) sulfur Urea-5% (W / V) ascorbic acid, dilute to the mark with 5% hydrochloric acid by mass fraction to obtain a mixed standard solution with a mercury concentration of 5.00 μg / L and an arsenic concentration of 100.0 μg / L.

[0029] (2) Preparation of the solution to be tested: after the marine sediment sample to be tested is air-dried, pulverized and sieved, take 0.15 g of the sample, put it in a 25 mL colorimetric tube, and add 5 mL of nitric acid and hydrochloric acid ( The volume ra...

Embodiment 2

[0039] Combined with the comparative analysis of the detection method of GB 17378.5 and the detection method in Example 1, the AFS instrument detects the results of mercury and arsenic in marine sediments in a certain sea area of ​​Guangdong, and performs data analysis to realize the application of the analysis method in marine sediment samples , the contents of mercury and arsenic in the six groups of marine sediments and the control sample GBW07316 (mercury 0.13±0.02mg / kg, arsenic 4.6±0.5mg / kg) were measured respectively. The results are shown in Table 4.

[0040] Table 4 Determination of standard substances in marine sediments

[0041]

[0042]According to the results in Table 4, the comparison results of the mercury and arsenic analysis data between the detection method of GB 17378.5 and the new detection method are satisfactory, the relative deviation of the detection results of the method in the determination of marine sediment 2 is <10%, and the mercury of the quality...

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Abstract

The invention discloses a method for detecting mercury and arsenic in marine sediments. The detection method comprises the following steps: (1) preparing a mixed standard solution: preparing the mixedstandard solution of mercury and arsenic; (2) preparing a to-be-detected solution: preparing the to-be-detected solution containing mercury and arsenic samples, wherein the to-be-detected solution contains mercury and arsenic elements; (3) selecting the mixed standard solution of mercury and arsenic obtained in the step (1), and making a mercury and arsenic standard curve through an atomic fluorescence spectrometer; and (4) measuring the mercury element and the arsenic element in the to-be-detected solution through the atomic fluorescence spectrometer to obtain detection values of fluorescence intensites of the mercury element and the arsenic element, and comparing the detection values with standard curves of mercury and arsenic to obtain the content of the mercury element and the contentof the arsenic element in the to-be-detected solution, thereby obtaining the content of the mercury element and the content of the arsenic element in the marine sediments. The method can simultaneously detect the content of mercury and the content of arsenic in the marine sediments, reduces the pretreatment and detection steps, and improves the working efficiency.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a method for detecting mercury and arsenic in marine sediments. Background technique [0002] According to the method given in GB17378.5-2007, at present, the analysis of mercury and arsenic in marine sediments in the laboratory is separated from sample pretreatment and detection. Although the above methods have been applied to mercury and arsenic in marine sediments, they have disadvantages such as time-consuming, laborious and cumbersome. There is an urgent need to develop a rapid detection method for mercury and arsenic in marine sediments. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for detecting mercury and arsenic in marine sediments. On the one hand, mercury and arsenic in marine sediments are pre-treated simultaneously according to the properties of mercury ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 窦文渊姚理马艳芳周漪波陈泽智
Owner GUANGDONG INST OF ANALYSIS CHINA NAT ANALYTICAL CENT GUANGZHOU
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