An X-ray fluorescence spectrometer for detecting harmful components in edible hollow capsules and its detection method

Abstract

The invention relates to an X-fluorescence spectrophotometer for detecting the harmful substances in edible hollow capsules and a detection method for harmful substances in edible hollow capsules. The X-fluorescence spectrophotometer comprises an objective table assembly, wherein an X-ray tube assembly, a detector assembly, a collimator assembly and a capsule fixed ring cover are fixedly arranged on the objective table assembly, wherein an X-ray tube is made of one of Cu, Co, Ni and Fe target materials, a primary filter of a collimator body adopts an Al or Ni filter, a secondary filter adopts an Al or an Al-Mg alloy filter. The X-fluorescence spectrum method aims at detecting the hollow capsules, so that Cr is no more than 2ppm (mg / Kg), sulfate (SO2) is no more than 200ppm (mg / Kg), the other heavy metal (Pb) is no more than 50ppm (mg / Kg), the detection limit is low, S which cannot be measured in AAS can also be measured, the detection operation is simple (without the need of sample treatment), and fast (generally within 100minutes), the analysis cost is extremely low, and the X-fluorescence spectrophotometer and the detection method are applicable to quality control and management on edible hollow capsules.

Description

Technical field: [0001] The invention belongs to the technical field of spectrum analyzers, and in particular relates to a spectrometer for detecting harmful components (such as heavy metal elements, sulfites, etc.) in edible hollow capsules for medicinal purposes and edible purposes and an analysis method thereof. Background technique: [0002] As one of the necessary methods for material composition analysis, X-ray fluorescence spectroscopy (XRF) has been widely used in geology, metallurgy, building materials, petrochemical industry, semiconductor industry, medicine and health, environmental protection and other fields. A fast, accurate and economical multi-element analysis method commonly used in , environmental science and so on. With the continuous improvement of the technical level, the X-ray fluorescence spectrometer is developing in the direction of automation, intelligence and specialization. [0003] The harmful components in the hollow capsules have exceeded the ...

AI Technical Summary

Problems solved by technology

[0005] (1) When it is usually applied to material analysis, the content analysis range of Cr is generally several ppm to 100%, and the limit requirement for Cr in hollow capsules is 2ppm, so the existing XRF spectrometer cannot meet the testing requirements of hollow capsules;

[0006] (2) Even if the XRF spectrometer used for the screening and testing of electronic and electrical products such as EU RoHS, although the detection accuracy of Cr is high, the detection limit is above several ppm, which cannot meet the testing requirements of capsules;

[0007] (3) Usually the optical path is far away, the source-level rays attenuate rapidly, and the insufficient light intensity makes it difficult to optimize the filter system;

[0008] (4) Light pipe detectors are all common configurations, especially for low-energy end elements (Cr, etc.) with insufficient measurement accuracy, and it is difficult to quantitatively analyze S elements

[0011] (1) Sulfite (as SO 2 meter) cannot be measured, and heavy metal elements such as Pb, Hg, As, Cd need to purchase corresponding hollow cathode lamps

[0012] (2) The equipment composition is complex

[0013] (3) Auxiliary equipment and reagents are required

[0014] (4) High cost of sample analysis

[0015] (5) Long sample analysis time

[0016] (6) The instrument needs to be placed in the corresponding laboratory, and the environmental requirements are relatively high

[0017] (7) Complicated daily maintenance

[0019] (9) Low security

Chemical reagents such as acetylene and nitrous oxide are toxic reagents, and improper operation can easily cause harm to the human body

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