简介:GC-MS analysis of shampoo is generally difficult
because the compounds of interest are present at low
levels in a complex water and oil containing emulsion.
Using DMI* the matrix influence of shampoo can be
almost el简介:GC-MS analysis of shampoo is generally difficult
because the compounds of interest are present at low
levels in a complex water and oil containing emulsion.
Using DMI* the matrix influence of shampoo can be
almost eliminated. A small aliquot of the shampoo is
put into a small glass vial which is automatically
inserted into the injector. The injector is then heated to
120°C just high enough to transfer the compounds of
interest from the sample onto the chromatographic
column. Only the vaporized compounds are transported
from the injector onto the GC-column where they are
refocused at the low starting temperature of the GC
program. Because the non-volatile matrix species remain
in the vial and the injector liner, no column
contamination occurs.
To automate the analysis a liner exchanger (LINEX) is
used.详细>