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首页> 外文期刊>Measurement Science & Technology >Quantitative drop spectroscopy using the drop analyser: theoretical and experimental approach for microvolume applications of non-turbid solutions
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Quantitative drop spectroscopy using the drop analyser: theoretical and experimental approach for microvolume applications of non-turbid solutions

机译：使用液滴分析仪的定量液滴光谱：非浊溶液微量应用的理论和实验方法

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The drop analyser, also termed the tensiograph, is an optical fibre-based instrument system for monitoring liquids. A comprehensive assessment of the drop analyser used as a UV-visible spectrophotometer has been undertaken employing both experimental and theoretical studies. A model of the tensiograph signal (tensiotrace) has been developed using a ray-tracing approach to accurately predict the form of the tensiotrace as an aid to drop spectroscopy. An analytical equation is derived for quantitative drop spectroscopy and the form of the equation has been experimentally tested. The equation applies to both the case of a growing drop and the situation in which the drop volume is held stationary. Measurements on both stationary and moving drops are of practical value. Modelling has been used to compute the average path length of the coupled light in the drop to give a result that compares favourably with values obtained from experimental measurements. An optimized method has been identified for quantitative drop spectroscopy measurements. Results from UV-visible studies on both pollutants in water and pharmaceuticals demonstrate the utility of this approach. Two key matters relating to the practicalities of drop spectroscopy are then discussed. Some experimental studies have been made to ascertain the practical limit in analyte concentration above which variations in transmitted light from the drop shape variations result. Here, tabulated information on a representative range of liquid types has been provided as a guide to optimized spectroscopic drop analysis. Secondly, the handling of micro-volume samples is discussed. The paper concludes with a brief evaluation of the usefulness of this drop spectroscopy approach, but specifically points to the importance of drop spectroscopy for nanoscience applications.
机译：液滴分析仪（也称为张力仪）是一种用于监测液体的基于光纤的仪器系统。通过实验和理论研究，对用作紫外可见分光光度计的液滴分析仪进行了综合评估。使用射线追踪方法开发了张力仪信号（张力描记线）模型，以准确预测张力描记线的形式，以辅助滴谱分析。导出了用于定量液滴光谱的分析方程，并且该方程的形式已通过实验测试。该公式适用于液滴不断增长的情况以及液滴体积保持固定的情况。静止和运动液滴的测量都具有实用价值。已使用建模来计算液滴中耦合光的平均路径长度，以提供与实验测量值相媲美的结果。已经确定了一种优化的方法用于定量液滴光谱测量。对水和药物中的污染物进行紫外线可见研究的结果证明了这种方法的实用性。然后讨论了与液滴光谱法实用性有关的两个关键问题。已经进行了一些实验研究来确定分析物浓度的实际极限，在该极限之上，由于液滴形状变化而导致透射光的变化。在此，已提供关于代表性液体类型范围的列表信息，以作为优化光谱滴分析的指南。其次，讨论了微量样品的处理。本文最后简要评估了这种液滴光谱方法的有效性，但特别指出了液滴光谱对于纳米科学应用的重要性。

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