According to the characteristic that noscapine ethanol solution ( 95 % ) has a maximum absorption peak in the wavelength of ( 310 ± 1 ) nm , the author measured the content uniformity and made some studies by using the second measuring method of the content uniformity , revised and enlarged in the supplement to China pharmacopoeia , Section ⅱ, Appendix , Edition 1995.The method operated simply and attained the reliable results .