简介:Ion-mobi lity spectrome try (IMS) has been know n
best for screening explos ives at airports , detecting
chem ical agen ts fo r the military, and monitor ing
stack gas emissi ons in industry. Th ese have been
supplem简介:Ion-mobi lity spectrome try (IMS) has been know n
best for screening explos ives at airports , detecting
chem ical agen ts fo r the military, and monitor ing
stack gas emissi ons in industry. Th ese have been
suppleme nted by ap plications for determi ning the
accumu lation of impurit ies in gas switch es for
hydroe lectric generat ing stat ions and fo r measur ing
the levels of volatile org anic compoun ds in the life-
suppor ting atmosp here of the Intern ational Space
Station . An enlarged scope of applicati ons for th is
fast method has become possible throug h advan ces
in miniat urization of drift tubes a nd new methods
for character izing ions. Also, ion sources of broa d
impo rtance, such a s elect rospray ionization , have
been add ed to drift tubes at ambien t pres sure.
Finall y, the ion chem istry, which long made IMS a
sensit ive and selective sensor but al so frustra ted
attempts to ration alize respo nse, has been explore d
and clarifi ed. New methods for intr oducing struc-tural conten t into mobility spectra mean th at mobi-lity spe ctromete rs can be general analyti cal
measu rement devices and can prov ide ra pid analys is
of samp les spann ing the range of vapor pressures
and chem ical classes. Th is article pres ents sel ected
recent developm ents in IMS with emphasi s on speed
of measu rement or on uses for which no other
method has been con venient or econom ical.详细>