Parr
Acid Digestion Bombs
in Five Convenient Sizes
Bulletin 4700
3
Parr Instrument
Acid Digestion Bombs
SPEED ANALYTICAL
PROCEDURES
P
arr acid digestion bombs have added a new alternative to
the task of preparing analytical samples for analysis. By
combining the unique chemical inertness of Teflon* with
the advantages of a sealed pressure vessel, these convenient
bombs offer a rapid procedure for sample dissolution or
digestion which has several important advantages over more
traditional methods of sample preparation. By providing a conve-
nient means for holding strong mineral acids or alkalis at temper-
atures well above normal boiling points, these sturdy digestion
bombs will:
• Accelerate digestions which otherwise would proceed slowly
if conducted in an open container at atmospheric pressure.
• Permit the use of strong acids, such as HF or aqua regia,
which will attack most other conventional containers.
• Dissolve analytical samples without losing trace elements
and without adding unwanted contaminants from the container
itself.
• Generate a vigorous chemical action which is a great time
saver in analytical procedures.
• Obtain complete digestion or dissolution of samples which
react slowly or incompletely when treated by other methods.
Chemists who have worked with sealed glass tubes and other
cumbersome digestion devices will recognize the attractiveness
of these convenient digestion vessels.
DISSOLVE INORGANIC
SAMPLES
Ores, rock samples, glass and other inorganic materials can be
dissolved rapidly in Parr acid digestion bombs using strong
mineral acids: HF, HCI, H 2 SO 4 , HNO 3 , Aqua Regia and others.
Other chemicals and manufactured products can be leached or
dissolved as well, all without introducing unwanted ions and with
complete sample recovery. Using reaction temperatures well
above normal boiling points, samples can be dissolved or
digested rapidly for all types of chemical analysis, particularly for
AA and ICP spectroscopy, and for other instrumental methods in
which trace elements must be identified.
DIGEST ORGANIC MATERIALS
Organic samples can be treated with nitric acid and other
oxidizing acids in these bombs with no difficulty, provided certain
safety precautions are observed. Alkaline or acid hydrolysis reac-
tions can also be handled equally well.
OTHER REACTIONS
In addition to their normal uses for sample digestion and
dissolution, these bombs serve as excellent general purpose
reactors for procedures requiring a small, Teflon-lined vessel for
use within prescribed pressure and temperature limits. Agitation
can be produced with a magnetic stir bar or by shaking or rolling
the bomb.
*duPont TFE fluorocarbon resin
Clockwise from far left:
4746 High Pressure Bomb,
4748 Large Capacity Bomb,
4744 General Purpose Bomb,
4749 General Purpose Bomb,
and the 4745 General Purpose Bomb.
