A grazing-type X-ray fluorescence measurement device for rapid detection of heavy metal content in cosmetics

A technology for fluorescence measurement and cosmetics, which is applied in the field of grazing-type X-ray fluorescence measurement devices, can solve the problems of complicated operation and time-consuming, and achieve the effects of low labor intensity, low cost and convenient use

Active Publication Date: 2018-05-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0003] Most of the existing inspection methods are atomic absorption spectrophotometry and atomic fluorescence spectrophotometry, but these methods are complex and time-consuming, and can only measure one element at a time

Method used

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  • A grazing-type X-ray fluorescence measurement device for rapid detection of heavy metal content in cosmetics
  • A grazing-type X-ray fluorescence measurement device for rapid detection of heavy metal content in cosmetics
  • A grazing-type X-ray fluorescence measurement device for rapid detection of heavy metal content in cosmetics

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Embodiment 1

[0029] 1. The silver target X-ray tube 1 of Dandong Dongfang Electron Tube Factory is used, and the X-ray tube high voltage 6 is set to 15,000 volts, which can effectively excite the special X-ray fluorescence of heavy metals in the sample; the angle stage 13 of Japan Sigma Company is used to make the excitation The angle between the X-rays emitted by the light source and the sample surface is 0.35 degrees, the distance between the X-ray tube 1 and the sample surface is 50 mm, and the diameter of the collimator 2 is 2 mm to ensure the best resolution of the heavy metal measuring instrument.

[0030] 2. The angle between the SDD-123 silicon drift detector 3 and the sample surface is 90 degrees and the distance is 15 mm, which is also used to ensure a better resolution of the analyzer.

[0031] 3. The excitation light source, detection device and digital multi-channel spectrometer 10 are fixed in the iron box 5 of 1 mm. The iron box 5 not only plays the role of electric shielding...

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Abstract

The invention discloses a grazing-type X-ray fluorescence measurement device for rapidly detecting the content of heavy metals in cosmetics, which includes an excitation light source, a detection device, a sample stage, an analyzer and a circuit output device. Collimator at the exit of X-ray tube; detection device includes silicon drift detector, detector high voltage, charge sensitive preamplifier and pulse shaping amplifier; sample stage includes manual rotary stage, angle stage and sample box; analyzer It is a digital multi-channel spectrometer; the circuit output equipment includes a computer, a printer and a display; adjust the position and angle of the sample stage, so that the X-ray emitted by the X-ray tube is irradiated on the cosmetic sample at a small angle, and stimulates the concentration of heavy metal elements in the cosmetic sample. The characteristic X-fluorescence information, the fluorescence information is received by the silicon drift detector, and after being shaped and amplified by the pulse shaping amplifier, it is converted into an energy spectrum that can be used for analysis by the digital multi-channel spectrometer, and the data is processed and controlled by the computer.

Description

Technical field: [0001] The invention relates to a grazing-type X-ray fluorescence measuring device for quickly detecting the content of heavy metals in cosmetics, which adopts the principle of grazing-type X-ray fluorescence analysis, and can especially quickly detect the content of heavy metals in cosmetics, which belongs to the field of rapid analysis of elements. Background technique: [0002] There are many kinds of metals and non-metals contained in cosmetics, some of which are deliberately added to achieve certain specific effects. For example, adding mercury can often have a whitening effect, because mercury compounds will destroy the enzyme activity of the epidermis, so that melanin cannot be formed; lead oxides have a certain covering effect; they can also be used for whitening; arsenic has effects on proteins and various amino acids. Strong affinity, due to its special physical properties, it shows the characteristics of being easily absorbed by organisms, and is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/223
Inventor 张焱贾文宝张新磊安达奇陈达
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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