Testing Equipment
Testing equipment
The principle of mass spectrometer: LC/MS/MS is the use of liquid chromatography (LC) and mass spectrometer (MS) in series. The principle of the instrument is that the LC chromatographs the components in the sample and injects them into the mass spectrometer for mass spectrometry analysis. When interpreting, the machine will crush the detected molecules to a limited extent; since the molecules have their own specific patterns when they are broken, the structure of the original molecules can be deduced by reading the “fingerprints” of these fragments. Mass spectrometers can deduce the structure of a molecule before it breaks up by reading the fragmented “fingerprint” of the molecule.
Vacuum concentration is the use of decompression (vacuum) to reduce the boiling point of the solvent. When the solution is heated to the boiling point, the solvent is vaporized and collected by a condenser, which can reduce the amount of solvent in the original solution to achieve the purpose of concentration.
The principle of high performance liquid chromatography analysis is to achieve the effect of separation through the mobile phase through the static phase; the distribution coefficients of the components in the mixture between the static phase and the mobile phase are different (that is, the affinity is different), so that they are separated in the column The residence time in the different and can be separated. If the compound has a strong affinity with the static phase, the eluting and extraction will be slow (that is, the retention time is long), and if the compound has a strong affinity with the mobile phase, the eluting and extraction will be fast (that is, the retention time is short). A method for separating target analytes from co-extracted interferences.
Inductively coupled plasma mass spectrometry (English: Inductively coupled plasma mass spectrometry, referred to as ICP-MS) has high analytical sensitivity and dynamic range, and can analyze isotope composition, from Li to U (except Ar, general inductively coupled plasma mass spectrometry is with Ar as the carrier gas).
