Method for determining micro iodine

A determination method and trace technology, applied in the direction of color/spectral property measurement, thermal excitation analysis, material excitation analysis, etc., can solve the problems of high detection limit, inability to meet detection, and recovery rate is not very high, and achieve low detection limit , The realization method is simple and easy, and the effect of overcoming the interference of the matrix

Inactive Publication Date: 2006-07-19
RUYUAN DONGYANGGUANG ELECTROCHEM FACTORY
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AI Technical Summary

Problems solved by technology

The above methods all require oxidation treatment, the detection limit is high, and the recovery rate is not very high, which cannot meet the detection of trace iodine in high-concentration brine.

Method used

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Embodiment Construction

[0013] A method for detecting trace amounts of iodine using an inductively coupled plasma emission spectrometer, the present embodiment is the detection of trace amounts of iodine in saturated brine, comprising the following steps:

[0014] (1) Take four 50ml clean volumetric flasks, add 30ml of saturated saline to be tested, add 100mg / L iodine standard solution 0, 20μl, 60μl, 100μl, 140μl respectively, and dilute to 50ml with sub-boiling water to form a standard series of solutions.

[0015] (2) The inductively coupled plasma emission spectrometer produced by German Spike company is used. Since iodine has a very high ionization energy and is a difficult to ionize element, the incident power is the main factor affecting the ionization of iodine. After a large number of experiments, it has been shown that the incident The greater the power, the smaller the back effect concentration of iodine and the higher the ionization efficiency of iodine, thereby improving the sensitivity of...

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Abstract

The invention relates to a method for using jigger coupling plasma emission spectrometer to test the attenuating iodine, which comprises: adding different value of iodine in the test sample, diluting it with water, forming the standard series solution, testing the signal density of the standard series solution on 178.3nm and adopting standard adding curve extension method to ascertain the iodine content of the test sample by doing data process of the signal density.

Description

【Technical field】 [0001] The invention relates to a method for measuring trace amounts of iodine, in particular to a method for detecting trace amounts of iodine using an inductively coupled plasma emission spectrometer. 【Background technique】 [0002] Glossary explanation: ICP-AES is the English abbreviation for Inductively Coupled Plasma-Atomic Emission Spectroscopy. [0003] At present, the methods for determining trace and trace amounts of iodine are mostly catalytic spectrophotometry, fluorescence spectrophotometry, etc., but these methods are cumbersome to operate and the analysis speed is low. In recent years, there are also a small number of reports about the detection of iodine by inductively coupled plasma atomic emission spectrometry (ICP-AES), which are mostly used in the detection of samples with higher iodine content such as environmental food and biological samples. In the chlor-alkali industry, the production of caustic soda by ionic membrane electrolysis ha...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N21/27
Inventor朱淑艳周宇华
OwnerRUYUAN DONGYANGGUANG ELECTROCHEM FACTORY