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switch 2 the third infrared quartz tube begins to hea, Press the power switch 3 the fourth infrared
quartz tube begins to heat; Press the power switch 4 the fifth infrared quartz tube begins to heat;
Press the power switch 5 the sixth infrared quartz tube begins to heat.
d. According to the instrument instructions and set the temperature to 450 DHS continuously
heating and then samples will gradually stop boiling, and then began to change color, when the
sample color becomes completely transparent blue-green liquid continue heating 10-20 min, after
digestion to complete at this time. Samples (such as moisture content is exorbitant, heating of the
digestive wall with black objects, the heat in two stages: first of all, first set to a temperature of
200 degrees, after reaching the temperature continue to heat the 20-30 min, and then reset the
temperature continue heating 30 to 60 min after 450 degrees, then the sample will gradually stop
boiling, and then began to change color, when the sample color becomes completely transparent
blue-green liquid continue heating 10-20 min, after digestion to complete at this time.)
Generally, the time required is 60-90min from the boot to the sample, which is determined
according to the sample (the higher the nitrogen content, the longer the digestion time).
e. After the digestion is completed, it will be moved to the test tube cooling rack together
with the tube digester and exhaust gas absorption device.
Precautions
a. The first answer extraction tee (suction filter pump) guarantee extraction tee three interface
flow state of the suction filter pump) and figure B side hole must be kept with A, C and inner hole,
to ensure that the digestive tube exhaust gas can be siphoned off, if there is A gas leak is more, you
can check here for the suction filter pump is normal, can rotate B side to adjust its position.
b. When installing exhaust gas absorption bottle, pay attention to the sealing ring of the
sealing ring and the digestive pipe joint to prevent the waste gas from overflowing. (when taking
the exhaust gas absorption bottle, first pour the bottle to one side and then take it off the whole, so
as to avoid the pressure to bring the digestive tube together with the accident.)
c. Since the location of the alimentary canal digestion process, the surrounding and the
temperature of the center position is a bit poor, so some sample color change first appeared in the
process of digestion, these all belong to normal phenomenon, at the same time in order to ensure
the digest completely, may be extended appropriately digestion time or increase the heating
temperature.
d. After the digestion is completed, the water source cannot be closed during the cooling
phase, otherwise there will be residual waste gas overflow.
