Photon Correlation DLS Nanoparticle Size and Zeta Potential Analyzer

Test principle

Using the principle of electrophoretic light scattering and photon correlation spectroscopy, the size of particle Zeta potential was determined according to the electrophoretic movement speed of particles in liquid. The population velocity of the electrophoretic motion of the particles, and the amount of Doppler shift of the scattered light caused by the laser irradiation of these particles, varies. Photon correlation spectroscopy analyzes the size of particle Zeta potential according to the frequency shift.  

Ultra-high-speed data acquisition

The core component of the instrument is through the HA1024 digital correlator, which can complete the collection of electrophoretic scattered light intensity and the calculation of the auto-correlation function in real time, so as to effectively reflect the information of the electrophoretic movement speed of the particles and lay the foundation for the accuracy of the Zeta potential test results.  

High sensitivity signal-to-noise ratio

Using professional-grade high-performance photomultiplier tubes, it has extremely high sensitivity and signal-to-noise ratio to photon signals.

High-precision constant temperature control

Using semiconductor temperature control technology, the temperature control accuracy is as high as 0.1 °C, so that the sample is always in a constant temperature state during the whole test process, avoiding the test deviation caused by the change of liquid viscosity and Brownian motion caused by temperature changes, and ensuring the accuracy and stability of the test results.

Stable optical path system

The optical path system constructed by the optical frequency shifting device and the optical fiber coupling technology makes the detection system not only small in size, but also has strong anti-interference ability, thus ensuring the stability of the test.

Model No.

PA-9001DLS

Executive standard

 ISO 133211996

 ISO 224122008

Measure range

1-10000nm (reference to sample)

-500mV to +500mV

Concentration range

0.1mg/ml~100mg/ml (reference to sample)

Electrophoretic mobility range

> ±20μm.cm/V.s

Highest conductivity

200mS/cm (reference to sample)

Accuracy error

<1% (National standard sample D50 value)

<10% (Standard sample)

Repeatability error

<1% (National standard sample D50 value)

<10%(Standard sample)

Laser Source

Semiconductor laser λ= 635nmP=1-40mw (adjustable)

Detector

Photomultiplier tube

Scattering angle

90^o

18^o

Sample cell volume

10mm*10mm*40mm,   1--4mL

10mm*10mm*60mm,   1mL

Temperate range

5-45℃

Temperature control accuracy

0.1℃

Test speed

<5 Min

 Digital correlator

Model

1024

1024

Auto-correlation channels

892

892

Baseline channel

4

-

Physical channels

5000

-

Unit delay time

1µs-10ms(adjustable)

1µs-10ms(adjustable)

Outer dimension

560*450*305mm

N.W.

20Kg