Atomic Absorption Analysis and Atomic Absorption Photometer
A kind of atomic absorption and absorbance technology, which is applied in the direction of material analysis, material analysis, color/spectral property measurement by optical means, etc., which can solve the problems of sample scattering and inability to perform correct measurement.
Active Publication Date: 2018-04-17
HITACHI HIGH-TECH CORP
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Problems solved by technology
[0004] For example, if boiling occurs during the drying stage, the sample will scatter and accurate measurement will not be possible
Method used
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Embodiment Construction
[0024] Below, refer to Figure 1 to Figure 4 , an embodiment of the spectrophotometer of the present invention will be described.
[0025] figure 1 It is a schematic configuration diagram of an atomic absorption photometer as a first embodiment of the present invention. exist figure 1 , the measurement light 4 is irradiated from the light source 3 to the sample 17 which is the object of measurement injected into the graphite tube 2 . The heating control part 14 controls the heating of the electric heating furnace 1 according to the heating temperature program input and set in advance in the operation part 12, the graphite tube 2 is heated by the electric heating furnace 1, and the sample 17 can be heated through the drying stage and the ashing stage. Atomized.
[0026] When heating the sample 17 , a magnetic field is applied to the sample 17 through the DC magnetic circuit 5 of the electric heating furnace 1 . The polarized light component light parallel to the magnetic f...
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In the atomic absorption photometer that dries the measurement sample of the liquid injected into the graphite tube in the pre-measurement stage, it is possible to judge whether or not the drying is performed properly, and to provide the goal of obtaining the target with the minimum number of measurements without repeating the measurement several times. Measurement sensitivity, measurement reproducibility. The absorbance of the reference light which is the component perpendicular to the magnetic field of the light passing through the heating part is obtained, and when the absorbance of the reference light exceeds a predetermined value within a predetermined time, it is determined that there is boiling of the sample. . Alternatively, the absorbance of the sample light which is a component parallel to the magnetic field of the light passing through the heating part and the absorbance of the reference light which is the component perpendicular to the magnetic field of the light passing through the heating part are obtained, and the above-mentioned When the corrected absorbance of the reference light absorbance exceeds a predetermined value, it is determined that there is boiling of the sample.
Description
technical field [0001] The present invention relates to an atomic absorption analysis method and an atomic absorption photometer, and particularly relates to drying a measurement sample of a liquid poured into a graphite tube before measurement, evaporating water in the drying step, and burning organic matter etc. in the ashing step After ashing, it is atomized in the atomization stage, and the atomic vapor is subjected to light absorption analysis to analyze metal elements by atomic absorption analysis method and atomic absorption photometer. Background technique [0002] In the electric heating furnace analysis atomic absorption spectrometer, a measurement sample of several μL to tens of μL of liquid is injected into the graphite tube, and the ash is ashed by burning organic matter etc. In the stage of atomization, it is finally heated to the temperature at which the sample is atomized for measurement. [0003] The analysts predetermine the temperature and heating time of...
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IPC IPC(8): G01N21/31
CPCG01N21/3103
Inventor 户边早人石田浩康坂元秀之
Owner HITACHI HIGH-TECH CORP