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Home > Products > Physical Testing Instruments > Super Operational Function Nanometer Particle Size Analyzer -DLS Dynamic light Scattering

Super Operational Function Nanometer Particle Size Analyzer -DLS Dynamic light Scattering

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Product Description

NS-90 Nanometer Particle Size Analyzer-DLS Dynamic light Scattering

NS-90 is a leading nanometer particle size analyzer in China launched by zhengzhou nanbei Instruments Co., Ltd. after the successful launch of TopSizer high-performance laser particle size analyzer in 2014,It’s a domestic leading nano-level particle size analysis instrument which has introduced and absorbed the advanced particle characterization technology from Malvern Panalytical, and combined the marketing application characteristics and demands of Chinese users. 90℃ dynamic light scattering technology is used to measure particle and molecular size, and static light scattering method is used to measure molecular weight of protein and polymer. The avalanche photodiode detector (APD) is exclusively equipped among those domestic brands, the system sensitivity is much higher than that of photomultiplier tube detector (PMT). The high-end He-Ne gas laser, together with accurate internal temperature control technology, sealed optical path and advanced software algorithm ensure data repeatability, accuracy and 0.3nm lower measurement limit; meanwhile, it supports SOP standard operation and measurement data intelligent evaluation, which is convenient for users.

Theory Dynamic light scattering technology NS-90 nanometer particle size analyzer uses dynamic light scattering technology to measure particle and molecular size. Random Brownian motion of particles in liquid is caused by collision of surrounding solvent molecules. Small particles move faster in liquid, while large particles move relatively slowly. This kind of motion has been going on all the time, so if we take a short time interval to take the motion "image" of the sample, we can see how much the particle has moved, and we can calculate how big it is. In the same time, if the displacement is small and the particle position is close, the particles in the sample are larger; on the contrary, if the displacement is large and the particle position changes greatly, the particles in the sample are smaller. Dynamic light scattering (DLS), also known as photon correlation spectroscopy (PCS), is a method to determine the size of particles by using the relationship between diffusion velocity and particle size. NS-90 nanometer particle size analyzer uses 90℃ dynamic light scattering technology, utilizes photoelectric detector to measure the scattering light intensity fluctuation signal generated by Brownian motion of particles in the sample, then obtains the Correlation Function through the digital correlator, finally uses Stokes Einstein equation to calculate the particle size and distribution. The particle size measured by this technology is the diameter of hard sphere diffused at the same speed as the measured particle.

Static light scattering technology:

NS-90 nanometer particle size analyzer uses static light scattering (SLS) technology to measure the molecular weight of protein and polymer. Static light scattering is a noninvasive technique for characterizing molecules in the solution. Similar to dynamic light scattering, when the laser irradiates the particles in the sample, the particles scatter in all directions. But different from dynamic light scattering, static light scattering is to measure the time average intensity of scattered light in a period of time. Because the time average light intensity cannot reflect the dynamic change of signal with time, it is called "static light scattering".Because the scattering light intensity produced by particles is directly proportional to the square of weight average molecular weight and particle concentration, the molecular weight of protein and polymer can be determined by static light scattering method. In this measurement method, the scattering light intensity (kC/R) of a series of samples at different concentrations is detected. The Debye Plot can be obtained by comparing this value with the scattering light intensity generated by the standard substance (such as toluene). The slope of the fitting line in the Debye diagram is the 2nd Virial Coefficient, A2, and the value of extending the fitting line to zero concentration is the reciprocal of the average molecular weight (1/MW). The unit of molecular weight is Da (Dalton) or g/mol.

Application: NS-90 nanometer particle size analyzer is a kind of high cost-effective nanometer particle characterization technology, which is suitable for applications that need higher particle size measurement sensitivity, or need the same results as using 90℃ scattering angle system. The instrument is suitable for the analysis of emulsion, suspension, protein and other samples. Typical applications: – Chemical products: silica gel, latex, metal colloid, pigment, ink, toner, ceramics –Cosmetics, glazing agents, food and agricultural chemicals and other products in the form of emulsion. – Pharmaceutical industry: fat emulsion, injection, microcapsule, monoclonal antibody and immunoglobulin – Measurement of protein and polymer molecular size

Technical parameters:

1. Measurement range:	0.3-5000 nm (subject to sample)
2. Measurement Principle:	Dynamic Light Scattering Method
3. Detection angle:	90 degrees
4. Repeatability error:	<1%(NIST retroactive latex standard)
5. Minimum sample volume:	20µL
6. Minimum sample	concentration 0.1mg/mL (subject to sample)
[Molecular weight]
7. Measuring range of molecular weight:	<1000 Da-2*107 Da, estimated by hydrodynamic diameter (dynamic light scattering)
8. Measuring range of molecular weight:	<10 000 Da-2 x 107 Da, calculated by Debye diagram (static light scattering)
9. Measurement Principle:	Dynamic Light Scattering, Static Light Scattering
10. Minimum sample volume:	20 µL (3-5 sample concentrations required)
[System Hardware]
11. Laser source:	He-Ne laser with high stability, wavelength 633 nm, power 4 mW. Fifty mW, 532 nm solid-state lasers are also available.
12. Laser safety:	Category 1, meeting CDRH and CE standards
13.Detector:	avalanche photodiode (APD) detector, QE > 50%
14. correlator:	sampling time 25ns-8000s, 4000 channels
15. Condensation Control:	Dry Air Purge
16. Temperature control range:	0 90 C (120 C temperature control tank is optional)
17. Temperature Control Accuracy:	:±0.1 degree C
18. Power supply:	AC 100-240V, 50-60Hz
19. Power:	Maximum 100W
[Weight and Size]
Dimensions:	320mm 600mm 260mm (W D H)
21. Weight:	21 kg
[Operating environment]
22. Computer configuration:	Intel Core 2 Duo, 4 GB memory, 160G hard disk capacity, display resolution 1440 *900 32bit and above
23. Computer Interface:	USB 2.0
Operating System:	Windows 7 Pro (32 bit/64 bit), Windows 10 (64 bit)
25. Temperature range:	10 C 35 C
26. Ambient humidity:	10%-90% without condensation

Performance features:

[Advanced optical system design] NS-90 nanometer particle size analyzer integrates dynamic light scattering technology and static light scattering technology in one instrument. The dynamic light scattering method is used to measure the particle size and molecular size, while the static light scattering method is used to determine the molecular weight of protein and polymer. This technology requires the highly stability of the whole system, and every design element must be optimized to ensure high accuracy and reproducibility. NS-90 is designed with sealed light path to prevent pollution. In the algorithm, Mie theory is used.

[Software with rich functions optimizes user experience] Standard operation procedure (SOP) is provided to simplify routine measurement; the best settings of various samples are automatically adjusted; the operation is simple, without collimation, correction or maintenance; intelligent, the quality of data report can be automatically judged.

[High performance detector] The sensitivity of APD detector with high efficiency is much higher than that of PMT. High cost but guaranteed optimal test performance.

[Research-level digital correlator] Using high-speed digital correlator, 4000 channels, sampling time as low as 25ns.

[Stable laser source and optical path system] The high stability He-Ne gas laser is used to ensure the data repeatability. The wavelength is 633nm and the power is 4 mW. 50 mW, 532nm solid-state laser can also be selected for the sample that cannot be detected by standard 633nm laser. The laser attenuator can be adjusted automatically in the dynamic range of 300000:1.

[Accurate internal temperature control system] The independent cycle temperature control tank can be set arbitrarily in the range of 0 – 90℃, and its control accuracy can reach 0.1℃, ensuring high reproducibility. 120℃ temperature control tank is also optional. Software functions: 1. Using advanced software technology and interface, easy to operate. 2. Full automatic setting and measurement: only the simplest training is needed to set up the instrument, including the position of sample cell, data recording, analysis and result display. 3. Support SOP standard operation procedures to ensure the consistency of operation and data repeatability. 4. Complete evaluation of measurement data: the instrument software can automatically judge the quality of the data report according to the test conditions. 5. Printing or screen display report is easy to use; including report designer, you can customize different reports according to different needs by selecting graphics and input parameters at the specified location. 6. The sample data and results are stored in the measurement file to facilitate data comparison. 7. Data analysis: the data is given in the form of graph or table, and the distribution algorithm is suitable for all kinds of samples, including single dispersion samples, wide distribution samples and multi-mode samples. Support: – temperature trend analysis – time trend analysis – trend analysis of selected parameters – full range statistics

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1. who are we?
We are based in Henan, China, start from 2008,sell to North America(14.60%),South America(12.50%),Mid East(11.00%),Africa(10.50%),Southeast Asia(10.50%),Eastern Europe(10.00%),Western Europe(8.00%),Southern Europe(8.00%),Eastern Asia(5.00%),Oceania(3.00%),Domestic Market(2.70%),Northern Europe(1.80%),Central America(1.30%),South Asia(0.20%). There are total about 301-500 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Glass Reactor,Low Temperature Freezer,Spray dryer,Ice cube machine,Freeze dryer

4. why should you buy from us not from other suppliers?
NANBEI is one of the largest and the most comprehensive instrument and equipment manufacturers in China.It has own research team,oversea after-sale,and professional technical support.NANBEI had obtained ISO9001,SGS,and CE,RoHS certification.

5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES；
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,MoneyGram,Credit Card,PayPal,Western Union,Cash,Escrow;
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Super Operational Function Nanometer Particle Size Analyzer -DLS Dynamic light Scattering

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