Inner product of RGB unit vectors for detecting color transition: application to feedback-based flow ratiometric titration

Inner product of RGB unit vectors for detecting color transition: application to feedback-based flow ratiometric titration
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用于检测颜色转变的 RGB 单位向量的内积:在基于反馈的流量比率滴定中的应用

DOI:
10.1007/s44211-022-00075-w
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发表时间:
2022
影响因子:
1.6
通讯作者:
Hideji Tanaka
Hideji Tanaka
中科院分区:
化学4区
文献类型:
--
作者:
Naoya Kakiuchi;Junya Ochiai;Masaki Takeuchi;Hideji Tanaka

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用于检测颜色转变的 RGB 单位向量的内积 (IP) 方法已进一步应用于基于反馈的流量比率滴定,包括非水滴定。当滴定剂/含有指示剂的滴定剂的流量比变化时,用下游的数字显微镜拍摄合并溶液的视频图像。指示器的颜色被转换为 RGB 单位向量。载体之间 IP 的变化用于确定当量点。该概念已成功应用于药物和醋样品的测定,具有合理的通量(> 18 s/滴定)和精度(RSD < 4.4%)。图形摘要
The inner product (IP) of RGB unit vectors’ approach for detecting color transition has further been applied to a feedback-based flow ratiometric titration, including nonaqueous titration. While the flow ratio of titrand/titrant containing an indicator was varying, the video image of the merged solution was taken with a digital microscope downstream. The indicator’s color was converted to an RGB unit vector. The change in IP between vectors was used for determining the equivalence point. The concept was successfully applied to the determinations of drug and vinegar samples with reasonable throughput rate (> 18 s/titration) and precision (RSD < 4.4%).Graphical abstract
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