Eight lamp holder flame graphite furnace integrated atomic absorption spectrophotometer

The principle of spectrophotometry:

According to Lambert Beer's law, spectrophotometry is a method of qualitative and quantitative analysis of a substance by measuring its absorbance or luminescence intensity at a specific wavelength or within a certain wavelength range.

Divided by wavelength:

(1) The ultraviolet range of 200-400nm,

(2) The visible light range of 400-760nm,

(3) Infrared region of 2.5-25 μ m (4000cm-1-400cm-1 in wavenumber)

The spectrophotometer commonly used in laboratories is a UV visible spectrophotometer, which is a device that combines UV visible functions. For example, total nitrogen GB11894-89 alkaline potassium persulfate digestion UV spectrophotometry; Lead GB7475-87 atomic absorption spectrophotometry; Hexavalent chromium GB7467-87 diphenylcarbazide spectrophotometric method.

The invention, production, and application of glass high-efficiency atomizers have greatly improved the sensitivity, detection limit, and stability of atomic absorption.

The application of flow injection hydride generator in atomic absorption spectrophotometer has achieved a certain level of sensitivity and detection limit of hydride atomic absorption method, improved the measurement efficiency, and can partially replace atomic fluorescence spectrophotometer.

The utility model relates to a high-precision transmission mechanism for a monochromator of an atomic absorption spectrophotometer, comprising a worm gear cover and a worm gear installed inside the worm gear cover, a worm gear cover and a worm rod installed inside the worm gear cover. The worm gear cover and the worm gear cover are installed on one side of the bottom plate, and the worm gear cover are connected to the worm gear cover. One end of the worm gear passes through the worm gear cover and is connected to the motor shaft through a coupling. A main shaft is coaxially fitted in the center hole of the worm gear, and the output end of the main shaft passes through the bottom plate and is connected to the monochromator. This utility model adopts the transmission mode of worm gear to control the monochromator, which improves the accuracy of the spectroscopic system.

Eight lamp holder flame graphite furnace integrated atomic absorption spectrophotometer