首页 > 技术问答 > 紫外可见和可见分光光度计的区别?

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紫外可见和可见分光光度计的区别?
2012-12-24 阅读次数 1885

在人们的普遍印象中紫外可见分光光度计和可见分光光度计 都是分光光度计 ,紫外可见分光光度计 要比可见分光光度计 贵,其它的好像没有多大的区别。其实他们的区别还是很大的,主要区别如下几项:

1、分析的波长范围不一样,紫外可见分光光度计 的波长范围是:200nm-1000nm,其中200nm-330nm标定为紫外光谱,330nm-800nm标定为可见光谱,800nm-1000nm标定为近红外光谱。

2、分析物质也不一样,紫外光谱大都分析有机物,可见光谱大都分析无机物,当然也不是绝对的,只是大部分有机物的吸收敏感点在紫外光谱区,无机物的吸收敏感点在可见光谱区。

3、使用的光源不一样,在目前国内外的分光光度计 中,大部分紫外光源用的是氘灯,可见光源用的是钨灯,紫外灯源的价格相对可见灯源的价格要高很多,当然也有一些用氙灯替代氘灯和钨灯,其价格更高。

4、结构设计不一样,紫外可见分光光度计 要求仪器的体积相对可见分光光度计要大一些,这其中除了考虑多了一个灯的摆放位置,还要考虑到灯的散热。

5、还有其它的一些不一样的,例如:电路设计原理、色散元件、光电转换元器件等


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