SSTS-Ajax for analysis on-line by gas chromatography

A switching system of triplet samples (SSTS-Ajax) is introduced to the analysis on-line by gas chromatography. The triplet samples (i.e., a sample and its two duplicates) can be obtained at the same time and then analyzed in turn by using this system. During a reaction, if the analysis of one sample is unsuccessful or the result is abnormal, a duplicate can be kept for a second analysis in the sampling tube without the following on-line analyses interrupted. Alternatively, the triplet samples can be respectively analyzed under different operating conditions, and thus offer more information about the sample. Furthermore, the triplet samples from different points on-line can be obtained alternately or even at the same time with the aforementioned advantages maintained. In addition, six samples from one point on-line can also be obtained at the same time or even at six different times and then analyzed one by one, which is very helpful when the duration of an analysis is much longer than the interval of two continuous sampling operations. The principle and usage of SSTS-Ajax is discussed in detail.