吸量管辅助垂直工具的设计及运用

Design and application of an auxiliary vertical tool for the pipette

基于微小型万向水准泡,设计专门用于吸量管的垂直辅助工具。采用长宽高为40 mm×30 mm×10 mm的亚克力板或硅胶材料作为支撑,设计直径为9.6 mm小孔及深度×直径为6 mm×16 mm的凹槽。配制平行样品考察方法的重现性,通过运用吸量管垂直辅助工具配制系列平行样品,并进行磺基水杨酸和Fe3+的吸光度测定,获得平行测定结果的相对标准偏差RSD小于1.0%;对标准样品进行对照实验,获得两组对照结果的相对误差分别为0.40%和0.27%。该设计方法表明,吸量管垂直辅助工具能够在实际中帮助使用者调整吸量管的垂直度,获得更准确的分析结果。

Based on the microminiature omnidirectional level bubble,a tool assisting the vertical placement of the pipette was designed.With acrylic plate or silica gel material of 40 mm×30 mm×10 mm in length,width and height as support,a hole with a diameter of 9.6 mm and a groove with a depth of 6 mm×16 mm were designed.A series of parallel samples were prepared by using the tool assisting the vertical placement of the pipette,so as to test the reproducibility of the method.The absorphotometry of sulfonysalicylic acid and Fe3+was measured and the relative standard deviation of RSD was less than 1.0%.Control experiment performed on the standard samples obtained a relative error of 0.4%and 0.27%for the two groups respectively.The design method shows that the tool assisting the vertical placement of the pipette can help the user to adjust the verticality of the pipette so as to obtain accurate analysis results.