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Atomic absorption spectrophotometer routine maintenance and maintenance
Atomic absorption spectrophotometer routine maintenance and maintenance
First, the use of atomic absorption spectrophotometer
Maintain the laboratory's hygiene and laboratory environment, and clean the laboratory regularly to avoid the energy of the mirrors being affected by the dust cover. After the test, the test supplies should be cleaned, the acid materials should be kept away from the instrument and the humidity in the instrument room should be maintained. In order to avoid acid gas, the optical device is corroded and moldy.
1. Maintenance of element lights
If the atomic absorption host is not used for a long time, please keep the instrument open and preheat it for 1~2 hours at intervals of one to two weeks. To extend the life. If the element lamp is not used for a long time, it will not be used or even ignited due to air leakage, component deflation, etc. Therefore, the element lamps that are not used for a long time should be ignited for 2 to 3 hours every 3 to 4 months to extend the service life and ensure the performance of the element lamps.
2. Regular inspection
2.1 Check the waste pipe and dump the waste in time.
2.2 When the waste liquid pipe effluent reaches the atomization barrel, it will be extremely unstable during the measurement. Therefore, it is necessary to check whether the waste liquid pipe is unblocked at any time and dump the waste liquid at regular intervals.
2.3 Regular inspection of the acetylene gas path to avoid air leakage and aging.
2.4 Regularly check the gas path, and every time you change the acetylene cylinder, you must thoroughly test the leak. The liquid that can be checked for leaks, such as soapy water, leaks at all the interfaces, and observes whether or not bubbles are generated to determine whether it leaks. Be sure to check the air line for leaks regularly. For the inspection method, refer to the acetylene inspection method.
3. Maintenance and maintenance of air compressors and air circuits
When the humidity in the instrument room is high, the air compressor is easy to accumulate water, which seriously affects the stability of the measurement. Water should be drained frequently to prevent water from entering the gas pipeline. Our standard air compressors have a water release button. When releasing water, please press this button under pressure to remove the water.
4. Maintenance and maintenance of the flame atomizer
4.1 After each sample measurement operation, spray the deionized water for 5 to 10 minutes in a flame-ignited state to clean the sample solution remaining in the spray chamber. Then stop the cleaning spray and turn off the acetylene gas after the water is dried.
4.2 Glass atomizer After testing the sample using hydrofluoric acid, it is necessary to pay attention to timely cleaning. The cleaning method is to spray the deionized water for 5 to 10 minutes under the condition of flame ignition to ensure its service life.
4.3 The burner can be removed and poured directly into the deionized water for cleaning.
5. Maintenance of graphite furnace atomizer
5.1 The inside of the graphite cone will produce different levels of residue due to the complexity of the test sample. The impurities that can be blown off will be removed by washing the ear ball, wiped with alcohol cotton, cleaned, naturally dried and then added to the graphite tube. Just fine.
5.2 Cleaning of the quartz window, the quartz window falling into the dust will reduce the transmittance and cause energy loss. The cleaning method is as follows: the quartz window is rotated and unscrewed, wiped clean with alcohol cotton, and the dirt is wiped cleaned by using a mirror paper, and the installation can be reset.
5.3 When the weather is hot in summer, the cooling water temperature should not be set too low (18~19°C), which will cause the condensation of water mist on the quartz window to affect the smooth passage of the light path.
TAS series atomic absorption spectrophotometer use precautions
In order to enable users to safely use TAS series atomic absorption spectrophotometer and other instruments, this paper describes the following precautions in the use of the instrument, so that users can carry out relevant experiments according to safe methods in operation, which can better improve the efficiency of use.
1. Precautions before ignition
1.1 Do not ignite the flame before the burner is installed in the combustion chamber. Do not ignite the flame before the sprayer is installed into the combustion chamber. Do not ignite the flame before the water fills the drain container.
1.2 When using TAS-990, do not remove the thermal protection disk. The flame temperature inside the instrument is not reliable. Check the gas flow setting before igniting the flame. Do not touch the flame protection device directly with your hands before burning.
1.3 Do not use a conventional burner to ignite the acetylene-nitrogen oxide flame. Do not put your fingers in front of the lamp holder, igniter, or flame detector. Do not put any foreign objects into the lamp holder. Do not touch the nebulizer capillary end cleaning line directly with your hand. The cleaning line may stick to your fingers.
2. Precautions during ignition
2.1 When pressing the ignition button, do not put your face and hands in the burner room. Do not look from the top of the combustion chamber, do not put your hands above the combustion chamber. Laughter - When the acetylene flame ignites, be careful when the flame rises to about 40 cm above the instrument. Be sure to close the flame shield (combustion chamber door) before ignition.
2.2 Do not move the atomizer while burning. Do not move the drain when burning. Do not move the burner while burning.
2.3 Do not touch the burner when it is hot red. Do not touch when the lamp is hot red.
2.4 Do not touch the flame protection device directly within 20 minutes of the flame being extinguished. Do not put anything on the flame. In addition to analysis, please do not use the flame for other purposes.
2.5 Do not plug the power cable into the socket on the terminal that is not grounded. Do not discard hollow cathode lamps at will, and some individual cathode metals may be toxic or easy to burn.