Abstract
AbstractThe concept of stationary‐phase optimized liquid chromatography (POPLC) was studied in the context of separation and detection aspects for the determination of explosives. A tailor‐made segmented column assembly with three complementary reverse‐phase materials enabled the separation of 14 priority target nitroaromatic explosives. This experimental approach resulted in excellent selectivity without using gradient‐elution protocols which can considerably deteriorate the performance of electrochemical detection. Consequently, the POPLC separations could be operated under isocratic conditions which were very important for the reliable use of electrochemical detection. Simultaneous UV and dual electrochemical detection resulting in three detection traces was exploited as an additional means for the further enhancement of selectivity in more complex samples.
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