title: [A new absorbance ratio-derivative method and its application to simultaneous determination of two components in a mixture].
abstract: In this paper, the principle of a new absorbance ratio-derivative method was described. The experimental methods of derivation with subtraction technique on ordinary spectrophotometer and simultaneous determination of phenol and resorcin were studied. The result is satisfying. The recovery of resorcin and phenol is in the range of 99.4%-104.2% (n = 25, RSD = 1.1%) and 97.1%-102.8% (n = 25, RSD = 1.6%) respectively.
authors.affiliation: Petrochemical Institute of East China University of Science and Technology, 200540 Shanghai.
authors.forename: J
authors.initials: J
authors.lastname: Xu
authors.forename: X
authors.initials: X
authors.lastname: Tang
authors.forename: X
authors.initials: X
authors.lastname: Jiang