Navigator LC/MS compact benchtop, single quadropole is a powerful instrument designed for the liquid chromatographic detection using Atmospheric Pressure Chemical Ionization (APCI) or Electrospray Ionization (ESI). The ions formed can be analyzed in positive or negative ion modes. The compounds suitable for analysis by electrospray are polar and of molecular weight less than 100000 amu. The higher molecular weight compounds such as proteins can produce multiply charged ions. These ions would be observed at lower masses because the mass to charge (m/z) ratio diminishes with increasing charge. The typical applications are: peptides, proteins, oligonucleotides, sugars, drugs, steroids, and pesticides. In this instrument we are limited to compounds less than 1000 amu. Compounds that typically get analyzed by APCI are usually less polar than the compounds analyzed in ESI and of molecular steroids weight less than 1000 amu. These compounds are usually pesticides, drugs, azo dyes, and steroids.