Foreign material analysis using both Mixture Analysis function and new library

A certain level of technique was necessary to identify successfully the IR spectrum of unknown sample which consists of multiple components by using conventional spectrum searching method, because this process was usually very complicated. In order to analyze multi-component sample, the first step was to search from library the spectrum which is the most similar to the spectrum of the main component, then to calculate the difference spectrum by subtracting the searched spectrum from the spectrum of the sample and to analyze other components through re-searching. It is basically possible to analyze 2nd component in the sample if such method is repeated several times, however searching accuracy declines depending on the number of components in sample, and a certain level of technique to analyze spectra properly is necessary. This time, new function named Mixture Analysis has been added to JASCO's standard search engine KnowItAll for easy analysis of the sample with multiple components. Mixture Analysis enables to search spectra for multiple components sample (Max. 4 different components) easily without any data processing such as difference spectrum calculation. In addition, JASCO has newly added approx. 400 kinds of Organic, Inorganic, Polymer spectra to their standard library with 10000 spectra. Those 400 spectra have been created through their measurement results for the past 3 years, which include not only foreign material analysis data but also Food Additives, Polymer and Fiber data. 

Following experiment was done to search foreign material inside of fiber by using Mixture Analysis and newly upgraded library with 10400 spectra. As the result, this sample was analyzed to have multiple components.