Introduction
BT-90 dynamic light scattering nano-laser particle size analyzer is a project that Dandong Baxter introduced the research results of South China Normal University and jointly implemented industrialization with South China Normal University. The principle is that when nanoparticles are dispersed in a liquid, the nanoparticles move irregularly under the impact of the Brownian motion of the liquid molecules. The smaller the particles, the faster the speed and the larger the amplitude; the larger the particles, the more the particles move. The slower the speed, the smaller the amplitude. When the laser beam is irradiated on the nano-particles, pulsating scattered light signals are generated. The rate of change of the intensity of these light signals is related to the particle's motion state (speed and amplitude), and also to the particle size. The pulsating scattered light signal is received and converted into an electrical signal, and then processed by a digital correlator to identify a valid dynamic light scattering signal. After inversion processing by special software, the particle size of the nanoparticle is calculated using the Stokes-Einstein equation. And its particle size distribution. Features
Adopting the internationally-accepted dynamic light scattering principle, the hardware correlator has 1,000 channels and receives dynamic light scattering signals through imported photomultiplier tubes, with high sensitivity, repeatability and accuracy.
High-power semiconductor laser with stable light intensity and long service life.
The temperature control range is 15-90 ℃, and the temperature accuracy is ≤0.5 ℃. The temperature control system is suitable for 1ml and 4ml sample cells to ensure accurate and reliable test results.
Measure the molecular weight of polymer materials: The light scattering method can be used to obtain the molecular weight by measuring the light intensity of 4 different concentration solutions. The operation is simple and the results are accurate and reliable. Technical Parameters
Test range: 1-9500nm (related to the sample)
Repeatability error: ≤1% (national standard sample D50 deviation)
Accuracy error: ≤1% (national standard sample D50 deviation)
Sample cell volume: 1ml & 4ml
Molecular weight range: 1000Da-2x107Da
Temperature control range of sample cell: 15 ℃ -90 ℃
Laser source: solid fiber laser (20mW / 635nm)
Scattering angle: 90 °
Detector: PMT or APD
Correlator: 1000 physical channels
Environmental requirements: temperature 19-90 ℃, humidity 0-95%, non-condensing
Operating system: WinXP / Win7 / Win8 / Win10
Computer interface: USB2.0 or 3.0
Voltage: AC220V, 50 / 60Hz
Volume: 680 × 440 × 220mm
Weight: 25kg
Introduction
BT-90 dynamic light scattering nano-laser particle size analyzer is a project that Dandong Baxter introduced the research results of South China Normal University and jointly implemented industrialization with South China Normal University. The principle is that when nanoparticles are dispersed in a liquid, the nanoparticles move irregularly under the impact of the Brownian motion of the liquid molecules. The smaller the particles, the faster the speed and the larger the amplitude; the larger the particles, the more the particles move. The slower the speed, the smaller the amplitude. When the laser beam is irradiated on the nano-particles, pulsating scattered light signals are generated. The rate of change of the intensity of these light signals is related to the particle's motion state (speed and amplitude), and also to the particle size. The pulsating scattered light signal is received and converted into an electrical signal, and then processed by a digital correlator to identify a valid dynamic light scattering signal. After inversion processing by special software, the particle size of the nanoparticle is calculated using the Stokes-Einstein equation. And its particle size distribution.
