METHODS FOR OPTICALLY DETERMINING A CHARACTERISTIC OF A SUBSTANCE

摘要

Methods using optical computing devices are disclosed. One exemplary optical computing device includes an electromagnetic radiation source (201) configured to optically interact with a sample (202) and first and second integrated computational elements (302, 304) arranged in primary and reference channels (Al, A2), respectively. The first and second integrated computational elements (302, 304) produce first and second modified electromagnetic radiations (306, 308), and a detector (212, 216, 220) is arranged to receive the first and second modified electromagnetic radiations (306, 308) and generate an output signal corresponding to the characteristic of the sample (202).