A simple method for automatical adjustment of light intensity on model 721 spectrophotometer is introduced.
介绍了一种实现721型分光光度计光强自动调节的简便方法。
This paper introduced some common faults of 721 spectrophotometer, found out the cause of formation, and presented fixing method, it may be used for instrument maintenance for reference.
介绍了721型分光光度计，灯电源电路和稳压电路故障现象，分析了故障产生的原因，提供了排除故障办法，对该仪器维修提供了借鉴的经验。
With xylenol orange as developer and model 721 spectrophotometer, it is simple and easy to measure human serum zinc concentration, which is suitable for hospital laboratories.
用二甲酚橙作显色剂、72型分光光度计进行血清锌检测，方法简便，适合医院化验室使用。
It is preliminary studied the ultraviolet absorption character of CeO2 nanoparticles were used for degrading helianthine with the help of the 721-type spectrophotometer.
本试验借助于721分光光度计对纳米二氧化铈的紫外吸收光降解性能进行了初步研究。
It is preliminary studied the ultraviolet absorption character of CeO2 nanoparticles were used for degrading helianthine with the help of the 721-type spectrophotometer.
本试验借助于721分光光度计对纳米二氧化铈的紫外吸收光降解性能进行了初步研究。
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