8
Parr Instrument
Microwave Digestion Bombs
Bulletin 4700
P r o v i d e :
• Fast digestion times.
• Temperatures to 250 °C.
• Pressures to 1200 psi.
• Complete containment of volatiles.
• Freedom from metal contamination.
Microwave Digestion Vessels
T
o expand the usefulness of its unique acid digestion
bombs, Parr has developed a line of chemically inert
vessels in which microwave heating can be used for rapid
sample dissolution in a sealed vessel. These bombs can be
placed directly in a microwave oven for specific, high speed
heating to drastically reduce the time required to dissolve or
digest an analytical sample. They are made in two sizes which
can be heated in any of the commercial microwave ovens regu-
larly offered for household use. Specifically constructed and/or
vented ovens are not required.
Speed Analytical Procedures
T
he aggressive digestion action produced at the higher
temperatures and pressures generated in these bombs
result in remarkably short digestion times, with many
materials requiring exposures of less than one minute to obtain
complete dissolution. And because of their unique, high strength
design, they provide a much more vigorous action that can be
obtained with open-cup microwave digestion systems that are
restricted to lower temperatures and pressures. In addition, there
is no loss of volatile matter from these sealed vessels, and the
sensitive parts of a microwave oven are not subjected to
corrosive acid fumes.
The rapid cycle time (approximately 20 to 30 minutes,
including time for cooling) offered by this procedure allows
digestions to be carried out in multiple steps, if desired, either for
analytical or safety reasons. Acid can be added in several steps,
or different acids can be added to dissolve inorganics after an
organic matrix has been destroyed.
Equally important in the list of advantages offered by these
bombs is the elimination of all metal from the bomb structure.
With all body parts made of a high strength polymer there are no
metal parts subject to corrosion, as with metal-jacketed bombs,
and no possible sources of metallic ion contamination.
4781
23 mL - 250 °C
1200 psig
Parr
Microwave
Acid Digestion Bombs
*
4781 Microwave Digestion Bomb
*U.S. Patent No. 4882128
