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Method for detecting hexavalent chromium ions based on fluorescence ratio

A hexavalent chromium ion, ratio technology, applied in fluorescence/phosphorescence, measuring device, material analysis by optical means, etc., can solve the problems of low detection sensitivity and difficult detection of hexavalent chromium

Active Publication Date: 2018-05-18
河南省农业科学院农业质量标准与检测技术研究所
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Problems solved by technology

[0005] The invention proposes a fluorescence ratio detection method for hexavalent chromium ions, which solves the technical problems of difficult detection and low detection sensitivity of hexavalent chromium in drinking water and agricultural products

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  • Method for detecting hexavalent chromium ions based on fluorescence ratio
  • Method for detecting hexavalent chromium ions based on fluorescence ratio
  • Method for detecting hexavalent chromium ions based on fluorescence ratio

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Embodiment Construction

[0027] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] The chemical reagents, solvents, and metal ions used in the process of preparing the fluorescent probe Cr6P1 in the present invention were all purchased from Aladdin Reagent Company. In the confirmation and performance testing process of the fluorescent probe Cr6P1, the DTX-400 nuclear magnetic resonance spectrometer of Bruke Company was used, the solvent was deuterated chloroform, and TMS was used as the internal standard to record the nuclear magnetic resonance hydrogen spectrum and carb...

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Abstract

The invention provides a method for detecting hexavalent chromium ions based on a fluorescence ratio, and particularly relates to a method for detecting hexavalent chromium ions (Cr(VI)) based on a rhodamine derivative (Rhodol hydrazide) ratio. The specific detection method is as follows: the Rhodol hydrazide is taken as a fluorescent reagent, and the fluorescence emission intensity ratios of twodifferent wavelengths (577 nm and 502 nm) are measured in a 10mM sulfuric acid solution to be taken as a quantitative basis, thereby realizing ratio detection of the hexavalent chromium ions. The detection method shows high selectively and sensitivity to the hexavalent chromium ions, the detection process is simple and convenient, the interference resistance is strong, the detection is fast and sensitive, and the detection result is accurate.

Description

technical field [0001] The invention relates to the detection technology of hexavalent chromium ions, in particular to a method for detecting hexavalent chromium ions by fluorescence ratio. Background technique [0002] Chromium is one of the essential trace elements for the human body, but the existence of chromium in nature is diverse. An appropriate amount of trivalent chromium is necessary for the human body, while hexavalent chromium is a carcinogen, and its toxicity is 100 times that of trivalent chromium. times. Hexavalent chromium ion (Cr(VI)) is the highest oxidation state of chromium. In acidic aqueous solution, Cr(VI) is dichromate (Cr 2 o 7 2− ) form, and in alkaline aqueous solution, Cr(VI) is dichromate (CrO 4 2− ) form exists. No matter in which form it exists, hexavalent chromium ions are highly toxic. After the human body contacts or ingests water or food containing this ion, it will cause serious damage to tissues and organs such as skin, mucous membr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 张迪贾斌刘冬梅尹海燕刘继红李漫王铁良王允王红旗
Owner 河南省农业科学院农业质量标准与检测技术研究所
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