Method for detecting copper ion content and eliminating interference by zinc reagent and masking agent

Abstract

The invention discloses a method for detecting the copper ion content and eliminating interference by a zinc reagent and a masking agent.The principle of the detection method is that the zinc reagent is in reaction with copper ions to produce a blue complex, characteristic absorption exists in the position of 60 nm wave length, and the absorbance value of the complex and the concentration are in certain linear relation in a certain concentration range, so that the content of the copper irons is calculated.At the same time, the zinc reagent is in reaction with zinc, nickel, lead, manganese and cobalt ions, and interference is caused to the copper iron detection.According to the method, the stability constant of the complex formed by metal irons and organic ligand is compared with the stability constant of the metal irons and the zinc reagent, so that a suitable masking agent is selected.The method does not involve a separation process, has the advantages that the treatment process is simple, the reagent blank is easy to control, and the masking agent has better interference resistance and good repeatability of the analysis result and is an import method for rapidly analyzing the copper ion content.

Description

technical field [0001] The application belongs to the field of monitoring copper ions in environmental water quality, and in particular provides a zinc reagent for detecting copper ion content and eliminating interference ions, which can quickly and accurately measure copper ion content. Background technique [0002] There are about 45 kinds of heavy metals, which generally belong to transition elements. Such as copper, lead, zinc, iron, cobalt, nickel, manganese, cadmium, mercury, tungsten, molybdenum, gold, silver, etc. Heavy metal ion pollution is one of the main sources of water environment pollution. Among them, copper is a very important micronutrient element, which is very important for animals and plants. At the same time, copper is an important metal with a wide range of applications and is used in many fields, such as: alloys, dyes, kitchen utensils, pipes, lines and so on. Copper salts can inhibit the growth of plankton or algae in water. In drinking water, if...

AI Technical Summary

Problems solved by technology

The separation process is complicated and time-consuming, and the probability of losing or introducing the components to be tested is relatively high, which requires high requirements for analysts

The matrix matching method has high requirements on the performance of the analytical instrument, and it is also very difficult to use. Analysts cannot accurately know which interfering components are contained in the sample.

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