Cenco hyvac 7 manual9/1/2023 ![]() ![]() ![]() A third water determining method is developed that is based on gas chromatographic (GC) technique. Under favorable conditions, water in a wide variety of samples can be determined in as little as twenty seconds. In the single-column LC method, more ยป a short column (2.5 cm form is used. The shift in equilibrium is linearly proportional to the amount of water present and occurs only in the presence of an acid catalyst. The detection system is based on a shift in the equilibrium between cinnamaldehyde and cinnamaldehyde dimethylacetal in the methanol eluent. ![]() In the LC methods, water in various analytical samples is separated from the sample matrices on either a single cation-exchange column or two cation-exchange columns via an ion-exclusion mechanism and determined using spectrophotometric detection. Two liquid chromatographic (LC) methods and one gas chromatographic (GC) method for the determination of water are developed. ![]()
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