Atmospheric Solids Analysis Probe (ASAP)
A low-cost alternative, the ASAP has proven to be a useful tool for the rapid direct analysis of volatile and semi-volatile solid and liquid samples using atmospheric pressure ionization. The ASAP technique utilizes heated nitrogen desolvation gas to vaporize the sample and a corona discharge for ionization. It is capable of ionizing low polarity compounds not amenable to ESI, APCI, and APPI at high sensitivity. It can also be used to analyze complex samples without the need for sample preparation or even chromatographic separation.