Ultraviolet and visible spectrometers have been in general use for the last 35 years end over this period have become the most important analytical instrument in the modernday laboratory. UV – Visible spectroscopy is useful as an analytical technique for two reasons; first , it can be used to identify some functional groups in molecules; secondly , it can be used for assaying . the second role is used to determine the content and the strength of a substance is very useful. Spectroscopic techniques emphatically UV – Visible spectroscopy is used to provide many answers in chemical and bio – chemical laboratories. In many applications other techniques could be employed but none competing UV-Visible spectrometry for its simplicity, versatility, speed, accuracy and cost-effectiveness.