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Multi-angle dynamic light scattering particle size distribution measuring device and method

A technology of dynamic light scattering and particle size distribution, applied in the field of optical measurement, can solve the problem of high cost, achieve the effect of reducing hardware cost, good measurement stability, and avoiding the problem of detection deviation

Active Publication Date: 2016-08-24
HUAZHONG UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the measurement device for multi-angle dynamic light scattering can use multiple detectors to detect dynamic light scattering information at different angles, but due to the use of multiple detectors, the performance of different detectors is different, which will introduce measurement errors and require expensive digital Correlator, higher cost

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Embodiment 1

[0036] Such as figure 1 As shown, the multi-angle dynamic light scattering information measuring device for measuring particle groups based on a virtual correlator in the present invention includes an incident optical path, a receiving system, and a dynamic light scattering information acquisition and processing unit; the incident optical path includes a laser 1 and a converging lens 2 , neutral density absorption filter 3 (Absorptive ND Filter, purchased from Edmund Company, absorbance OD is 1, diameter is 12.5mm) and cuvette 6; receiving system includes cuvette 6, adjustable aperture 7, convex lens 8. Aperture diaphragm 9 , convex lens 10 and photon counting probe 12 ; the dynamic light scattering information collection and processing unit includes photon counter 13 , data collection and correlation function calculation software and calculation processing unit 14 .

[0037] The photon counting probe 12 is fixed on the rotary translation stage. The rotary translation stage is...

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Abstract

The invention discloses a multi-angle dynamic light scattering particle size distribution measuring device and method. The device comprises a laser device, a colorimetric dish, a rotary displacement table, a receiving module, a photon counter and a computing and processing module, wherein the colorimetric dish is used for containing nano-particle suspension liquid to be measured, the rotary displacement table is provided with an outer disc and an inner disc, the receiving module is located on the outer disc, rotates around the rotating axis with the outer disc and is used for receiving light scattered by the nano-particle suspension liquid to be measured at different angles, the photon counter is used for recording the information about the time-variable light intensity of the scattered light received by the receiving module at different angles, and the computing and processing module is used for computing the particle size distribution of nano-particles in the nano-particle suspension liquid to be measured according to the received scattered light and recorded time-variable light intensity information. The detecting deviation problem existing when different-angle dynamic light scattering information is detected by using multiple detectors is avoided, and the multi-angle dynamic light scattering particle size distribution measuring device is good in stability and high in measuring accuracy.

Description

technical field [0001] The invention belongs to the field of optical measurement, and more specifically, relates to a multi-angle dynamic light scattering particle size distribution measurement device and method. The measurement device and method are based on a virtual correlator, and the device also uses a rotary displacement platform, which is especially suitable for Measure polydisperse nanoparticle population size distributions. Background technique [0002] Particle size distribution refers to the distribution law of the size of all particles in a particle group, and is a shape parameter of a particle group composed of a large number of particles, which can usually be described by methods such as the average particle size of the particle group and the particle size distribution function. The measurement of particle size distribution is widely used in chemical, pharmaceutical, environmental protection, machinery, light industry and food industries, and has gradually deve...

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Application Information

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IPC IPC(8): G01N15/02
CPCG01N15/0211G01N2015/0222
Inventor 杨克成李蕾李微王万研
Owner HUAZHONG UNIV OF SCI & TECH
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