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Method for rapidly detecting trace copper in wastewater

A waste water and rapid technology, applied in the field of analytical chemistry, can solve the problems of expensive instruments and consumables, difficult general application, low detection limit, etc., and achieve the effect of wide detection range, simple operation method and high accuracy.

Inactive Publication Date: 2013-02-27
KUNMING FURUITE TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of ionic liquid / salt two-phase (ILATPS) and various chromatographic techniques and spectroscopic techniques can achieve very low detection limits, but the instruments and consumables are expensive, and the operation is complicated and requires professional technicians. It is still difficult for general application

Method used

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  • Method for rapidly detecting trace copper in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] ① Take 5mL of mineral wastewater and Cu with concentrations of 1, 5, 10, 15, 25, 30 μg / L 2+ 5mL each of the standard series of solutions was placed in a centrifuge tube with a stopper, and the concentration of 30 μg / mL was added to each centrifuge tube 1 mL of DDTC-Na solution, and adjust the pH to 5 with acetic acid-sodium acetate buffer solution; ② quickly inject 0.1 mL of 1-butyl-3-methylimidazolium tetrafluoroborate into the centrifuge tube of step ①; ③ put 0.3 gNa 2 CO 3 , quickly added to the centrifuge tube in step ② to form a uniform emulsified system; ④ centrifuge the centrifuge tube in step ③ at 2500 r / min for 10 min to break the emulsion, and the extractant forms a drop at the bottom of the centrifuge tube, and the DDTC-Cu complex The compound is extracted into this drop of extractant; ⑤Under the same conditions, compare the color scale of a drop of yellow solution formed by mineral waste water at the bottom of the centrifuge tube with a drop of solution ...

Embodiment 2

[0024] ①Take 5mL of industrial wastewater and Cu with concentrations of 1, 5, 10, 15, 20 μg / L respectively 2+ 5mL each of the standard series of solutions was placed in a centrifuge tube with a stopper, and the concentration of 20 μg / mL was added to each centrifuge tube 1 mL of DDTC-Na solution, and adjust the pH to 5 with acetic acid-sodium acetate buffer solution; ② quickly inject 0.2 mL of 1-ethyl-3-methylimidazolium tetrafluoroborate into the centrifuge tube of step ①; ③ put Add 0.4g NaCl quickly to the centrifuge tube in step ② to form a uniform emulsion system; ④ centrifuge the centrifuge tube in step ③ at 3000 r / min for 7 min to break the emulsion, and the extractant forms a drop at the bottom of the centrifuge tube, DDTC -Cu complex is extracted into this drop of extractant; ⑤Under the same conditions, the industrial wastewater forms a drop of yellow solution at the bottom of the centrifuge tube and compares the color scale of a drop of solution formed by the standar...

Embodiment 3

[0026] ① Take 5mL of domestic wastewater and Cu with concentrations of 1, 5, 10, and 15 μg / L respectively 2+ Put 5mL each of the standard series of solutions in a centrifuge tube with a stopper, and add a concentration of 15μg / mL to each centrifuge tube 1 mL of DDTC-Na solution, and adjust the pH to 5 with acetic acid-sodium acetate buffer solution; ② quickly inject 0.1 mL of 1-propyl-3-methylimidazolium tetrafluoroborate into the centrifuge tube of step ①; ③ put 0.5 g (NH 4 ) 2 SO 4 Add salt quickly to the centrifuge tube in step ② to form a uniform emulsified system; ④ centrifuge the centrifuge tube in step ③ at 4000 r / min for 5 minutes to break the emulsion, and the extractant forms a drop at the bottom of the centrifuge tube, DDTC-Cu The complex is extracted into this drop of extractant; ⑤Under the same conditions, compare the color scale of a drop of yellow solution formed by domestic wastewater at the bottom of the centrifuge tube with a drop of solution formed by a...

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Abstract

The invention discloses a method for rapidly detecting trace copper in wastewater, which comprises the following steps of: firstly enabling copper to react with sodium diethyl dithiocarbamatetrihydrate (DDTC-Na), separating and enriching Cu-DDTC complex in a sample by adopting ionic liquid-salt aqueous two-phase system (ILATPS) to form yellow complex which is enriched at the bottom of an ionic tube, and making a comparison with standard copper content to detect the trace copper in the sample, wherein the detection limit is 1mug / L. The method for rapidly detecting trace copper in wastewater has the advantages that the method is simple to operate, the detection sensitivity is high, organic solvent is not needed, the method is environmental-friendly, the detection time is short and the like, and is a simple, convenient, rapid and accurate analysis method, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, in particular to a method for rapidly detecting trace copper in waste water. Background technique [0002] Heavy metal elements will have an impact on the ecological environment and human health. Heavy metals generally exist in nature in natural concentrations, but due to the increasing mining, smelting, processing and commodity manufacturing activities of heavy metals, many heavy metals such as lead, cadmium, cobalt, etc. enter the atmosphere, water and soil, causing severe Therefore, it is becoming increasingly important to accurately detect heavy metal elements in environmental samples. Copper is an important heavy metal element that is toxic to ecological organisms such as algae, fungi, bacteria, and viruses. Copper is also suspected of causing liver damage in infants and young children. All kinds of waste water, daily necessities, and even food may be the source of copper. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 郑伟廖金华杨亚玲
Owner KUNMING FURUITE TRADE
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