基于静力衡量法和光学法的超微容量测量方法对比分析

分别使用静力衡量法和光学法对超微容量进行测量。光学法测量中,按照分光原理分别设计了以时域分光和空域分光为基础的测量系统。2套光学测量系统在1μL和10μL的容量测量数据分别为0.967μL和0.929μL以及9.976μL和9.729μL;时域分光测量系统在1μL和10μL测量点重复性为3.2%和2.54%,空域分光测量系统为3.6%和2.02%。2套光学系统相比,时域分光系统的探测器灵敏度更好,在低浓度超微容量测量中能检测到更多光强信息。光学法与静力衡量法获得了相同的结论,证明了光学法在超微容量测量领域的可行性。光学法与静力衡量法相比,光学法针对液体蒸发的处理方法更加简单,光学元件的设计可以有效减小蒸发的影响。

Comparative Analysis of Ultramicro Volume Measurement Methods Based on Static Measurement method and Optical Method

The static weighing method and optical method are used to measure the ultramicro volume. In the optical method, the measurement systems based on the time-domain and spatial-domain spectroscopic methods are designed and built respectively. The measurement data of the two optical measurement systems at 1 μL and 10 μL are 0.967 μL and 0.929 μL, and 9.976 μL and 9.729 μL, respectively The renaturation is 3.2% and 2.54%, and the spatial spectroscopic measurement system is 3.6% and 2.02%. The same conclusion is obtained with the static measurement method, which proves the feasibility of optical method in the field of ultramicro volume measurement. Compared with the two optical systems, the detector sensitivity of the time-domain spectrometer is better, and more light intensity information can be detected in the ultra-fine volume measurement of low concentration; Compared with the static weighing method,.the optical method for liquid evaporation is simpler, and the design of optical elements can effectively reduce the influence of evaporation.