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Kit for detecting iodine concentration

A kit and iodine concentration technology, which is applied in the field of chemical detection, can solve the problems of difficult reagent purchase, expensive instruments, and a large amount of arsenic-containing waste liquid, and achieve the effects of automatic operation, fast reaction speed, and small pore volume

Inactive Publication Date: 2020-06-19
HARBIN MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the strict examination and restrictions on the qualifications of highly toxic reagents purchased by the public security department, it is difficult to purchase the arsenic trioxide (commonly known as arsenic) reagent required for the application of the arsenic-cerium catalytic photometric standard method, and a large amount of arsenic-containing waste liquid is produced after the application of this method. pollute the environment
Inductively coupled plasma mass spectrometry (ICP-MS) has a fast analysis speed and is currently used in some laboratories, but the instrument is expensive and the cost of use is very high, so it is difficult to promote its use in prefecture-level, city-level and county-level laboratories

Method used

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  • Kit for detecting iodine concentration
  • Kit for detecting iodine concentration
  • Kit for detecting iodine concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] In this embodiment, the sample with a known concentration of 50.9±2.3 μg / L is used as the test solution 1 (ie, the sample to be tested), and 8 main wells are used as the standard curve test series, and 24 auxiliary wells are used to detect the test solution 1.

[0077] (1) Preparation of standard solution:

[0078] Take out the detection solution A, detection solution B, and detection solution C in the kit for use.

[0079] Immediately before use, draw 30 μL of detection solution C into a 10 mL constant volume tube, and dilute to the mark with pure water to obtain a 300 μg / L iodine standard intermediate solution.

[0080] Take the solution of environmental standard sample batch number B1903109, accurately absorb 0.4mL, and dilute it to a 10mL constant volume tube to obtain a liquid with a concentration of 5.09±0.23mg / L. Take 100.0μL of this liquid and place it in a 10mL constant volume tube. Dilute pure water to the mark to obtain 50.9±2.3μg / L of the test solution 1. ...

Embodiment 2

[0098] In this embodiment, a sample with a known concentration of 50.9±2.3 μg / L is used as the test solution 2, 8 main wells are used as the standard curve test column, and 24 auxiliary wells are used to test the test solution 2.

[0099] (1) Preparation of standard solution:

[0100] Take out the detection solution A, detection solution B, and detection solution C in the kit for use.

[0101] Immediately before use, draw 30 μL of detection solution C into a 10 mL constant volume tube, and dilute to the mark with pure water to obtain a 300 μg / L iodine standard intermediate solution.

[0102] Take the liquid with a concentration of 5.09±0.23mg / L obtained by diluting the environmental standard sample, take 100.0μL of the liquid and place it in a 10mL constant volume tube, and dilute to the mark with pure water to obtain a test solution of 50.9±2.3μg / L two.

[0103] (2) Sample addition:

[0104] A. Select 8 wells in a 96-well plate as the main wells, add 75 μL of iodine standa...

Embodiment 3

[0119] In this embodiment, a sample with a known concentration of 124±12.4 μg / L was used as the test solution 3, 8 main wells were used as the standard curve test column, and 24 auxiliary wells were used to detect the test solution 3.

[0120] (1) Preparation of standard solution:

[0121] Take out the detection solution A, detection solution B, and detection solution C in the kit for use.

[0122] Immediately before use, draw 30 μL of detection solution C into a 10 mL constant volume tube, and dilute to the mark with pure water to obtain a 300 μg / L iodine standard intermediate solution.

[0123] Take the solution of the environmental standard sample, accurately draw 0.2mL, and dilute it into a 10mL constant volume tube to obtain the test solution 3 with a concentration of 124±12.4gμg / L.

[0124] (2) Sample addition:

[0125] A. Select 8 wells in a 96-well plate as the main wells, add 75 μL of iodine standard intermediate solution with a concentration of 300 μg / L to the firs...

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Abstract

The invention discloses a kit for detecting iodine concentration. The kit comprises: a porous plate comprising a plurality of micropores; a detection liquid A comprising an arsenite ion solution; a detection liquid B comprising a tetravalent cerium ion solution; and a detection solution C comprising an iodine standard stock solution. When the concentration of iodine is detected, a plurality of micropores are used as a reaction container; a plurality of iodine catalyzed arsenic-cerium redox reactions are carried out at the same time according to preset requirements, reactants comprise arseniteions provided by the detection solution A and tetravalent cerium ions provided by the detection solution B, and a catalyst comprises a plurality of known different concentrations of iodine provided bythe detection solution C and unknown concentrations of iodine provided by a to-be-detected sample solution; and after the reaction, detection is carried out in a micropore detector with a preset detection wavelength, and further the concentration of iodine in the to-be-detected sample solution is obtained by calculation. Thus, the iodine concentration can be simply and rapidly detected with low cost, and waste emission can be reduced.

Description

technical field [0001] The invention relates to the technical field of chemical detection, in particular to a kit for detecting iodine concentration. Background technique [0002] Water iodine is an indicator of population iodine nutrition evaluation and a main monitoring indicator in the prevention and treatment of iodine deficiency disorders. Taking the national survey of iodine content in drinking water carried out in my country from 2017 to 2018 as an example, the survey has tested the water iodine in more than 40,000 townships and more than 120,000 villages. It is conservatively estimated that the number of samples tested is nearly 400,000. This shows that , my country's iodine deficiency disease prevention and control institutions have a great demand for the detection of water iodine. [0003] In recent years, water iodine detection is mainly based on GB / T5750.5-2006 (11.1) standard test method for drinking water-inorganic non-metallic indicators. This method has good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33G01N31/10
CPCG01N21/33G01N31/10
Inventor 纪晓红高彦辉杨艳梅孙殿军武辽伟范晨露娄群苏梦瑶张在宏张欣
Owner HARBIN MEDICAL UNIVERSITY
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