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Updated: Jul 31, 2026

Untargeted Metabolomics from Biological Sources Using Ultraperformance Liquid Chromatography-High Resolution Mass Spectrometry UPLC-HRMS
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[通过UHPLC/MS/MS进行Ruhemann的紫色监测,用于ninhydrin测试]

Takashi Kurohara1, Chiye Tatebe1, Yumiko Fujiwara1

  • 1National Institute of Health Sciences.

Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan
|February 26, 2025
PubMed
概括

开发了一种新的UHPLC/MS/MS方法来客观地监测鲁赫曼紫色 (RP),增强了食品添加剂分析的传统ninhydrin测试. 这种分析方法支持视觉判断,并优化了测试条件.

关键词:
鲁赫曼的紫色就是鲁赫曼的紫色.在UHPLC/MS/MS中使用.氨基酸氨基酸是一种氨基酸.食品添加剂是一种食品添加剂.宁氨酸是什么 宁氨酸

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Precipitation Titration: Endpoint Detection Methods01:19

Precipitation Titration: Endpoint Detection Methods

In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
In the Volhard method, a standard excess of AgNO3 is first added to the...