|
|||||
|
|
|
|
|
|
| |||||
 |
 |
||||||
|
 |
 |
 |
 |
 |
|
 |
|
GC-MS/ LC-MSGas Chromatography/ Mass Spectometry (GC-MS) CANTEST research and analysis facilities offer a wide range of techniques, including gas chromatography (GC) and gas chromatography/ mass spectrometry (GC-MS). GC-MS combines the selectivity of gas chromatography with the sensitivity of mass spectrometry for detection. Where sensitivity is not a priority, conventional flame ionization detection (FID) may be employed. These techniques are particularly suitable for characterization, identification and quantitation of volatile and semi-volatile organic compounds with relatively low molecular weights (<400 Daltons). GC-MS can also be used to characterize unknown components in a sample by comparing retention times with the comprehensive NIST database library. Specific applications include the following:
Liquid Chromatography/ Mass Spectrometry (LC-MS) CANTEST uses other analytical methods such as: high performance liquid chromatography (HPLC) and liquid chromatography/ mass spectrometry (LC-MS). LC-MS is a powerful analytical separation technique that combines the selectivity of chromatography with the sensitivity of MS detection. LC-MS vs GC-MS LC-MS is used to analyze a wider range of compounds than GC-MS. Large, polar and thermally labile analytes that are not amenable to GC may be studied by LC-MS without derivatization. The MS source is capable of operating in both electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI) modes; it is both compatible with most chromatographic separations and can monitor both positive and negative ion formations. Specific applications include the following:
|
|
|||||||||||||
|
|
|
||||||||||||||
|
|
|
|
|
|
|||||||||||
 |
 |
 |
 |
 |
 |