Atomic absorption spectrophotometerIt is an analytical instrument based on the characteristic radiation absorption of ground state atomic vapor, mainly used for trace or trace detection of metal elements.
Working Principle:
By emitting characteristic spectral lines of the tested element through a hollow cathode lamp and converting them into gaseous ground state atoms through an atomizer, the absorption intensity of atomic vapor at specific wavelengths of light is measured, and the element concentration is calculated based on Lambert Beer's law.
Generally speaking, high-performance hollow cathode lamps with low melting point and volatile elements have significant application effects, such as As, Bi, Pb, Sb, Se, Zn and other elements.
More comprehensive security performance testing
Multi mode automatic leak detection function, once a leak is detected, ignition is prohibited. Using high-performance flame-retardant materials, the gas will automatically shut down after being cut off.
Daily maintenance:
Environmental requirements:
Keep the laboratory clean to avoid dust covering the optical components and affecting the optical path transmittance. Acidic substances should be kept away from the instruments to prevent corrosion.
When the instrument is not used for a long time, it should be preheated for 1-2 hours every 1-2 weeks, and the element lamp should be ignited for 2-3 hours every 3-4 months to prevent performance degradation.
Waste liquid and gas path inspection:
Timely dispose of waste liquid to prevent liquid accumulation from affecting atomization stability; The acetylene gas circuit needs to be checked regularly with soapy water to avoid aging and gas leakage.
The air compressor needs to be regularly drained to prevent water from entering the air pipeline.
Optical and pneumatic maintenance:
Spectral system:
Optical components should be cleaned at least once a year, and oil stains can be wiped with a mixture of ethanol and ether (1:1). Direct contact with the mirror surface is strictly prohibited.
Monochromators need to be kept dry to avoid moisture and mold.
Gas system:
After replacing the acetylene cylinder, a comprehensive leak detection is required; The air pipeline needs to be checked regularly for leaks, and the water discharge button of the air compressor needs to be operated under pressure.