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Detection kit for on-site quick detection of iron ions in water and preparing method

A technology for detecting reagents and iron ions, which is applied in the direction of material analysis by observing the impact on chemical indicators, and analysis by making materials undergo chemical reactions, which can solve the problems of difficult effective control of time and adverse effects on the accuracy of test results, etc. , to achieve the effect of high accuracy, easy operation and elimination of influence

Inactive Publication Date: 2016-10-05
WENZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the temperature of water samples collected in different seasons and different regions is not the same, the time required for dissolving dry powder detection reagents is also different. It is difficult to effectively control the time required for the entire detection process, which also adversely affects the accuracy of the detection results.

Method used

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  • Detection kit for on-site quick detection of iron ions in water and preparing method
  • Detection kit for on-site quick detection of iron ions in water and preparing method
  • Detection kit for on-site quick detection of iron ions in water and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A rapid on-site detection kit for iron ions in water, the kit is composed of the following materials:

[0023] Liquid iron ion detection reagent 1 bottle (10ml)

[0024] Iron ion standard color card 1 piece

[0025] The preparation method of this kit is realized through the following steps:

[0026] 1. Preparation method of liquid iron ion detection reagent:

[0027] (1) Weigh 0.20g 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol, 6g anhydrous sodium sulfite, 75g vitamin C, 15g thiourea, add 800ml 60mmol / L pH3.5 Acetic acid-sodium acetate buffer was stirred and dissolved;

[0028] (2), add 0.3ml Tween-80, 50ml ethylene glycol, stir to dissolve;

[0029] (3) Dilute to 1000ml with 60mmol / L pH3.5 acetic acid-sodium acetate buffer solution.

[0030] 2. Preparation method of iron ion standard color card:

[0031] (1), precision takes 0.1000g content and is the metallic iron of 99.99%, is settled to 1000ml after dissolving with 10ml 50% nitric acid, obtains the ferric ion...

Embodiment 2

[0037] In order to further prove the inventiveness of the present invention, the present invention has done following comparative experiment, investigates the impact of the change of reagent blank on the accuracy of measurement result. The on-site rapid detection kit for iron ions in water described in Example 1 of this law is the test group, and the detection kit that does not deduct the reagent blank and uses the standard color card for direct colorimetry is the control group, and the detection kits in the two groups of kits are The reagents were stored in a 4°C refrigerator and a 37°C water bath for 7 days, and the same water sample whose iron ion concentration was determined to be 0.06mg / L by atomic absorption method was tested. Use a 721 spectrophotometer to record the reagent blank value. During the test, the optical path of the cuvette is 1 cm, the test wavelength is 560 nm, and the reference solution is deionized water. The results are shown in Table 2.

[0038] Table ...

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Abstract

The invention discloses a detection kit which is used for on-site quick detection of iron ions in water and capable of eliminating reagent blank influences and a preparing method of the kit. In a faintly acid medium, iron in water reacts with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol to generate a purple red complex, and the shade of the purple red complex is in direct proportion to the concentration of iron ions; a comparison with a test tube is made after the color of an iron ion standard color chart with reagent blank eliminated and a blank tube color are overlaid, and the concentration of iron ions in a water sample to be tested is obtained. The detection kit is especially suitable for on-site quick detection of iron ions in water.

Description

technical field [0001] The invention relates to the field of water quality detection, in particular to an on-site rapid detection kit for iron ions in water and a preparation method. Background technique [0002] Iron (Fe) is an essential trace element for the human body. It has many physiological functions in the human body. In daily life, the human body absorbs trace elements through drinking water in a corresponding proportion. The detection of iron ion content is a detection item stipulated in the national drinking water standard. [0003] The detection of iron ions in water mostly uses atomic absorption spectrophotometry, visible light spectrophotometry, inductively coupled plasma atomic emission spectrometry / mass spectrometry, electrochemical analysis, etc. Professional operators and technicians complete the test, most of the methods still need expensive large-scale special instruments, which cannot meet the requirements of fast and simple on-site testing. In some spec...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 苏波波吴秀萍毛丽灿连国军
Owner WENZHOU MEDICAL UNIV
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