LSD-N9 Nano particle size analyzer

    Based on the principle of dynamic light scattering, the sample is dispersed in an automatically temperature-controlled sample cell. A high-purity laser irradiates the sample, and an optical fiber positioned at a 90° angle to the laser collects the fluctuating dynamic signals of scattered light intensity caused by the Brownian motion of particles over time. A photomultiplier tube transmits the high-fidelity dynamic signals to a correlator, which performs autocorrelation computations to generate the sample’s autocorrelation curve. By applying mathematical methods, the particle diffusion coefficient is derived, and the Stokes-Einstein equation is further utilized to obtain the particle size distribution results.
    LSD-N9 Nano Laser Particle Size Analyzer is widely used for particle characterization of organic/inorganic nanoparticles, emulsions, polymers, micelles, viral antibodies, proteins, and other samples. It also enables the detection and analysis of sample system stability and particle aggregation tendencies.

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Description

Technical Parameter

Test range 1-10000nm
Concentration range 0.1mg/L-100mg/L
Accuracy error <1% (average particle size of national standard samples)
Repeatability error <1% (average particle size of national standard samples)
Laser Main laser: λ=532nm, semiconductor laser (temperature control protection)
Detector Photomultiplier tube (PMT)
Scattering angle 90°
Sample cell 10mm*10mm, 4ml (with temperature control protection)
Temperature range 5-90℃（accuracy:±0.1℃）
Test speed <1Min/time (excluding sample dispersion time)
Photon Correlator Physical channels: 512;
Equivalent channels: 10000;
Baseline channels: 8;
Sampling and delay time: 1us~200us;
Minimum resolution: 6ns;

 

Features

Advanced testing principle
    Using dynamic light scattering principle and photon correlation spectroscopy technology, the particle size is determined according to the speed of Brownian motion of particles in liquid.
    Using photon correlation spectroscopy to perform statistical and correlation analysis on dynamic scattering spectrum, and calculate its particle size according to Stokes-Einstein equation.

 

High sensitivity and signal-to-noise ratio
    The detector uses high-performance photomultiplier tube (PMT) with low dark count and high sensitivity, which has extremely high sensitivity and signal-to-noise ratio for photon signals, thus ensuring high accuracy and high resolution of the test results;

 

Powerful computing function
    Using PCS technology to measure the size of nanometer-level particles, it is necessary to be able to distinguish nanosecond signal fluctuations. The core component of the instrument, the high-speed photon correlator, has an extremely high resolution of 6ns and a very high signal processing speed. It can quickly and in real time collect the number of photons and calculate related operations, laying the foundation for test accuracy;

 

Stable optical path system

    The photon correlation spectrum detection system, which is composed of a constant temperature controlled high-power semiconductor laser and optical fiber, is not only small in size, but also has strong anti-interference ability and stability, ensuring the repeatability and stability of the test results;

 

High-precision temperature control system
    The temperature control system of the sample pool and the laser are accurate to ±0.1°C. This keeps the sample and the laser light source in a constant temperature state throughout the test process, avoiding the impact of temperature changes on the test results and ensuring test accuracy and repeatability.

 

DC power supply
    External adapter uses full DC power supply technology. No 220V AC power will enter the instrument, eliminating the interference of AC power on instrument signal acquisition, making instrument measurement more stable and safer.