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Highly catalytic and stable Au@AuPt nanoparticles for visual and quantitative detection of E. coli O157:H7

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  • 1Institute of Analytical Technology and Smart Instruments, Xiamen Key Laboratory of Food and Drug Safety, College of Environment and Public Health, Xiamen Huaxia University, Xiamen 361024, China. huangys@hxxy.edu.cn.

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Effects of EDTA on End-Point Detection Methods01:18

Effects of EDTA on End-Point Detection Methods

Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
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