In this text the applications of infrared spectrometry in quantitative analysis of drug have been reviewed by reviewing literature and summarizing in recent years. On the base of a brief review on the definition

characteristics and research of IR spectrometry

the text focused on that it has been applied the field of non-destructive drug quantitative analysis by using the chemical metrology methods

such as partial least squares

first derivative

second derivative and artificial neural network. Compared with traditional methods-HPLC and UV

IR has good correlation coefficient and accuracy. The article also pointed out that it has been used in the field of food

pesticides

gas

copolymer

chemistry and chemical engineering. The results show that the method is accurate

based on its own advantages

and has good application prospect.