Detection method of dynamic light scattering particle detection device

Abstract

A detection method of a dynamic light scattering particle detection device belongs to the technical field of dynamic light scattering nano particle measurement devices. It is characterized in that: the optical fiber probe includes a transmitting optical fiber and a receiving optical fiber; one end of the outer shell of the optical fiber probe (5) is a closed end, and the other end is an open end, and a fixed disc (7) is tightly installed on the open end, and through the fixed disc (7) The built-in through hole fixes the self-focusing lens. The self-focusing lens includes a transmitting lens and a receiving lens. The inner ends of the transmitting lens and the receiving lens are respectively connected to the transmitting optical fiber and the receiving optical fiber. The invention changes the optical path of the traditional dynamic light scattering device, introduces the optical fiber into the dynamic light scattering technology, uses the optical fiber to integrate the emitting optical path and the receiving optical path, can measure high-concentration samples, and can realize on-line detection in industrial production.

Description

Technical field [0001] The detection method of the dynamic light scattering particle detection device belongs to the technical field of dynamic light scattering nano particle detection device. Background technique [0002] The size and distribution of submicron and nano particles are the main parameters that characterize their performance, so the measurement of these parameters is of great significance. Dynamic light scattering technology is an effective method for submicron and nanometer particle size measurement. [0003] In the dynamic light scattering particle measurement technology, photon correlation spectroscopy is widely used, which uses a photomultiplier tube to receive scattered light at a fixed spatial position. Because the scattered light is extremely weak, the photomultiplier tube can only receive discrete photon pulses, and at the same time output corresponding electrical pulses at the output end, and send the pulse signals to the photon correlator. After the photon...

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Problems solved by technology

[0004] However, the optical path of the traditional dynamic light scattering device is usually composed of a series of optical devices placed outside the sample cell, such as lenses and pinholes, resulting in a large volume of the entire measurement device; and because the scattered light is transmitted in the air, it is easily affected by dust, The interference of external light and vibration causes the signal-to-noise ratio of the system to be low, and the quality of the correlation function output by the photon correlator is degraded, so that reliable measurement results cannot be obtained. As a result, the traditional dynamic light scattering device is only suitable for laboratories and cannot For industrial online measurement

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