介绍利用Intel8031单片微型计算机,对国内的721型分光光度计进行了改造,设计了简便的接口电路。并编写了汇编语言程序.在微机的控制下,可实现光门开闭、调零、确定透过率100%及吸光度测定的自动化。此外,还具有部分校正仪器漂移的功能。改造后的分光光度计吸光度数字显示,吸光度测定范围及重现性优于原721型分光光度计,在实验室常规分析、在线分析及流动注射分析中有广阔的应用前景。 Introduced the use of Intel8031 single-chip microcomputer, the domestic 721 spectrophotometer was modified, designed a simple interface circuit. And compilation of assembly language program.Under the control of the microcomputer, it can realize the automatic opening and closing of light door, zero adjustment, 100% transmittance and the determination of absorbance. In addition, there is a partial correction instrument drift function. After the transformation of the spectrophotometer absorbance figures show that the determination of absorbance range and reproducibility is better than the original 721 spectrophotometer, routine laboratory analysis, on-line analysis and flow injection analysis has broad application prospects.