1. Before starting, check whether the plugs are in good contact, adjust the position of the slit, return all the knobs of the instrument panel to zero, and then turn on the power. Turn on the low voltage first, then turn on the high voltage, and the opposite is true when turning off.
2. The hollow cathode lamp needs a certain warm-up time. The lamp current rises slowly from low to high to the specified value to prevent a sudden rise and cause cathode sputtering. Some low melting point element lamps such as Sn, Pb, etc., are used to prevent vibration, gently remove after work, and place the cathode upwards, and then move the box after cooling. Handle the lamp lightly and gently. If there is dirt or fingerprints on the window, wipe it gently with lens paper. The hollow cathode lamp has an abnormal light color. You can use a lamp current inverter (equivalent to a simple lamp power supply device) to connect the positive and negative of the lamp in reverse, and ignite it at the maximum current of the lamp for 20-30 minutes; or at a large current of 100- Ignite at 150mA for 1-2 minutes to make the cathode red hot. The titanium wire or tantalum sheet on the cathode is a getter that can absorb the remaining impurity gas in the lamp, which can restore the performance of the lamp. Hollow cathode lamps that are not in use are ignited regularly at rated current for 30 minutes.
3. The capillary of the sprayer is made of platinum-iridium alloy, do not spray high-concentration fluorine-containing sample liquid. Prevent the capillary tube from bending during work. If it is blocked, use a thin metal wire to remove it. Be careful not to damage the capillary opening or the inner wall.
4. After the daily analysis is completed, the distilled water should be sprayed without extinguishing the fire, and the sprayer, spray chamber and burner should be cleaned. After spraying high concentration of acid and alkali, the spray chamber should be thoroughly rinsed with water to prevent corrosion. After spraying the organic solution, spray the organic flux and acetone for 5 minutes each, and then spray 1% nitric acid and distilled water for 5 minutes each. If there are salt crystals in the burner, the flame is zigzag, and can be gently scraped off with filter paper or hard paper. If necessary, remove the burner, clean it with 1: 1 ethanol-acetone, and clean it with a brush dipped in water. If there are molten beads, it can be lightly polished with metallographic sandpaper, soaking with acid is strictly prohibited.
5. The optical components in the monochromator are strictly forbidden to touch and adjust without authorization. A small amount of gas can be used to blow off the dust on the surface, and it is not allowed to wipe it with lens cleaning paper. To prevent the grating from being damp and moldy, the desiccant in the cassette should be replaced frequently. When the photomultiplier tube room needs to be repaired, the shielding cover must be opened when the negative high voltage is turned off to prevent direct light from being irradiated, causing the photomultiplier tube to produce an irreversible "fatigue" effect.
6. When igniting, turn on the auxiliary gas first, and then turn on the gas. When turning off, turn off the gas first, then turn off the auxiliary gas.
7. When using a graphite furnace, the sample injection position should be consistent to reduce errors. When working, the pressure of the cooling water and the flow rate of the inert gas flow should be stable. Be sure to connect the power supply under the condition of inert gas, otherwise it will burn the graphite tube.
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