title: Decisive problems of zone-circulating flow injection analysis and its solution.
abstract: Although experiment and computer analysis of zone-circulating flow injection analysis (ZCFIA) data have been investigated, there are still some essential problems inherent to ZCFIA. Computer program of high dimensional modified simplex method was used for resolving peaks of ZCFIA damped response curves. Peaks are resolved on the basis of the criterion that each area of the peak surrounded by the curve and the abscissa is equal, because each sample zone circulates repeatedly in the manifold in equal volume. As a result, the peaks of the damped response curve have been resolved into each component and the curve obtained by summing these components has been proved to be equal to the original response curve. By following up the data analysis of ZCFIA, it was found that there were many conflicts in the manual analysis of data by Li. At least, the dispersion in a flow system should not be investigated by ZCFIA, and it might be studied by the single-line manifold of FIA.
authors.affiliation: Department of Chemistry, College of Science, Rikkyo (St. Paul's) University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo 171, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Narusawa
authors.forename: Y
authors.initials: Y
authors.lastname: Miyamae