Method for detecting trace heavy metal ions in water body

A trace heavy metal and ion detection technology, applied in color/spectral characteristic measurement, analysis through chemical reaction of materials, material analysis through observation of the influence on chemical indicators, etc., can solve low detection sensitivity and overlapping absorbance , Electrochemical method detection cost is high, to achieve the effect of simple method, simple method, and expanded detection limit

Inactive Publication Date: 2015-10-14
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

Among them, the electrochemical method is relatively expensive to detect, while the biological method has not yet reached the level of practical application. The spectroscopic method is relatively good, but it has the defects of overlapping absorbance and low detection sensitivity when detecting mixed metal ions.

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  • Method for detecting trace heavy metal ions in water body

Examples

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Embodiment 1

[0035] The enrichment multiple of Example 1 is: more than 90 times, the enrichment multiple of Example 2 is: more than 450 times, the enrichment multiple of Example 3 is: more than 90 times, and the enrichment multiple of Example 4 is: 15 times Above, the enrichment multiple of embodiment 5 is: more than 40 times, the enrichment multiple of embodiment 6 is: more than 40 times, the enrichment multiple of embodiment 7 is: more than 35 times, the enrichment multiple of embodiment 8 is: More than 40 times, the enrichment multiple of embodiment 9 is: more than 42 times, the enrichment multiple of embodiment 10 is: more than 30 times, the enrichment multiple of embodiment 11 is: more than 40 times, the enrichment multiple of embodiment 12 For: more than 30 times.

[0036] software programming:

[0037] (1) List in the table 10 groups divided into 10 groups with copper, cobalt and nickel ion concentrations in the range of 0.01mg / L-0.1mg / L;

[0038] (2) List in the table 100 groups ...

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Abstract

The invention discloses a method for detecting trace heavy metal ions in a water body. The method comprises the following steps: (1) ion enrichment: resin is added into a water sample to be monitored that contains trace heavy metal ions so as to adsorb trace heavy metal ions in a water body; (2) elution: resin obtained from the step (1) is added into an acid aqueous solution, heavy metal ions are eluted, and an eluant is collected; and (3) detection: aqueous alkali is used for neutralization, and a buffer solution and a developer aqueous solution are added; an ultraviolet and visible spectrophotometer is used for detection, and absorbance is recorded; absorbance is arranged and entered into software programming, and absorbance is analyzed by the software programming so as to obtain concentration of each ion in the water sample to be monitored that contains trace heavy metal ions. The method provided by the invention is simple and accurate, and can be used for carrying out resolution of UV overlapping peaks and more accurately detecting absorbance of various heavy metal ions so as to calculate concentration of metal ions in the water body. The method can control ion enrichment factor.

Description

technical field [0001] The invention relates to a method for monitoring heavy metal ions, in particular to an online monitoring method for trace heavy metal ions in water. Background technique [0002] In recent years, my country's water environment and soil environment have been seriously polluted by metals. Metals are non-degradable substances that can only flow through aqueous solutions, soil or living organisms in the natural cycle. Metal itself is a trace element necessary for the human body, but due to the excessive discharge of metals in the industry in recent years, the metals in the environment have seriously exceeded the standard, and the amount of metal ions enriched through the food chain has already exceeded the level that humans can bear. Therefore, the rapid and accurate detection of heavy metal ions in water under various conditions such as environmental pollution incidents and ecological risk screening has become a top priority. [0003] Existing heavy met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/33
Inventor 郭玉高赵贺韩叶林马硕管山
Owner TIANJIN POLYTECHNIC UNIV
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