1.作分析试剂用的生物低分子物质生物低分子物质的范围极广,从糖、氨基酸和核酸等构成生物体的有关物质,直到维生素和甾族激素等微量物质,以及生物碱等植物成分都包括在内。这些物质在化学分析中作为试剂使用的有以下几方面。 1)分析用的标准试剂:用仪器分析进行定量测定时,常用的吸光光度法和萤光分析法等,一般是用已知量的标准试样,对待测物质进行对比测定。用这些方法作生物低分子物质的定量测定时,必须用纯度高的试剂作为待测 1. Biological Reagents for Analysis Reagents Low-molecular-weight biological substances range widely from organisms such as sugars, amino acids and nucleic acids to trace substances such as vitamins and steroid hormones and plant components such as alkaloids Are included. The use of these substances as reagents in chemical analysis is as follows. 1) Standard reagents for analysis: In the case of quantitative analysis by instrumental analysis, commonly used absorbance spectrophotometry and fluorescence analysis, etc., are generally used for the comparative determination of substances to be tested using standard samples of known amounts. When using these methods for quantitative determination of biological low molecular weight substances, it is necessary to use a reagent of high purity as a test substance