Nicomp 380 Z3000 Basic zeta电位及纳米粒度仪
Z3000 Basic 面议通信电缆 网络设备 无线通信 云计算|大数据 显示设备 存储设备 网络辅助设备 信号传输处理 多媒体设备 广播系统 智慧城市管理系统 其它智慧基建产品
奥法美嘉科技有限公司
奥法美嘉科技有限公司
DynamicLightScatteringTheNicomp380SubmicronParticleSizeAnalyzerusestheprincipleofDynamicLightScattering(DLS)toobtainthepartcilesizedistributionofcolloidalsystemswhosesizesrangefrom0
Dynamic Light Scattering
The Nicomp 380 Submicron Particle Size Analyzer uses the principle of Dynamic Light Scattering (DLS) to obtain the partcile size distribution of colloidal systems whose sizes range from 0.5 nanomters to 6 microns. DLS works by illuminating a group of particles in suspension with a focused laser beam which gives rise to many scattered light waves. These waves interfere with each other and produce a net scattered intensity that fluctuates as a function of time at some distant detector. Diffusion, or Brownian motion, of the particles causes random variations in the phases of the individual waves, resulting in a fluctuating light intensity. The particle size distribution can be obtained by analyzing the time behavior of these fluctuations using an autocorrelator. The autocorrelation function for a single uniform size distribution is a decaying exponential function where particle diffusivity is easily obtained from the decay time. Finally the particle radius can easily be calculated using the Stokes-Einstein relationship. In general most samples are not uniform instead they are quite often polydisperse, having a range of particle sizes. The autocorrelation function then consists of a combination of decaying exponential functions, each having a different decay time and the analysis of the autocorrelation function is no longer quite simple. The instrument using varying deconvolution algorithms must invert the raw data in order to arrive at the best estimate of the true particle size distribution. The Nicomp excels at characterizing these difficult particle size distributions by utilizing a group of unique deconvolution algorithms ranging from a simple Gaussian approximation to a proprietary high resolution multi-modal deconvolution analyses called the “Nicomp Distribution". Some of the unique features found on Gaussian analysis mode is a baseline adjust parameter which provides aggregate compensation that excedes the sensitivity found on most other instruments which employ a dust or dirt factor. The Gaussian analysis mode also allows for the user to specify a solid or vesicle weighting mode for analysing thin walled colloidal systems like liposomes. The Nicomp Analysis Mode is a proprietary high-resolution deconvolution algorithm that was first introduced over 25 years ago. It has historically proven its ability to accurately analyze even the most difficult closely spaced bimodals (e.g. 2:1 apart) and even certain trimodal distributions. This is extremely useful in finding the native peak of the aggregate distribution. The standard Nicomp 380 is equipped with a 12 mW laser diode and PMT detector with an optical fiber set to 90°. Sample is introduced with drop-in cells. The 380 is the only Dynamic Light Scattering Instrument designed using a modular approach. Its capabilities may be enhanced by adding one or more modules: Autodilutio This patented module eliminates the need for manual dilution of concentrated sample. Autodilution makes particle size analysis quick and easy, with no training required. Results are highly reproducible. 380/HPLD High Power Laser Diodes PSS offers an array of high power laser diodes to meet the needs of our most demanding applications. Higher power lasers are needed to extend the lower limit of our instrument by providing adequate scattering from small particles. They are also useful when measuring large particles such as dextrans, which yield insufficient scattering intensity because of index of refraction properties. The result is a more versatile instrument, ideal for sizing microemulsions, surfactant micelles, proteins and other macromolecules. It can even estimate the extent of aggregration of biopolymers after reconstitution, without chromatographic separation. Avalanche Photo Diode (APD) Detector The Nicomp 380 can be equipped with various high-powered lasers as well as a high-gain Avalanche Photo Diode Detector (APD which provides approximately seven times the gain of a conventional photomultiplier tube. The APD is used to increase signal-to-noise and sensitivity in systems that do not scatter light well. Proteins, micelles, other macro-molecular-based systems, and nanoparticles are often dilute (1 mg/ml or less) and are made of atoms that do not scatter light well. The Avalanche Photo Diode coupled with a nominally higher powered laser diode module offers a low cost solution for accurately analyzing nanoparticles in a short period of time. 380/MA Multi-angle Goniometer Particles larger than 100 nm do not scatter light isotropically in all directions. It is possible to make DLS measurements more sensitive to certain sized particles by changing the angle of detection. The Nicomp 380 can be equipped with a mini-goniometer that moves the optical fiber between 12° and 175° by 0.9° increments. |
详情请参考Nicomp 380 N3000。点击跳转
详情请参考Nicomp 380 N3000。点击跳转
详情请参考Nicomp 380 N3000。点击跳转
详情请参考Nicomp 380 N3000。点击跳转
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| Nicomp 380 系列彩页 | ||
| 序号 | 文件类型 | 下载链接 |
| 1 |  | PSS_380合集_Brochures_CN_v3.0 |
| 2 | | PSS_N3000_纳米粒度仪_flyer_CN_v4.0 |
| 3 | | PSS_Z3000_纳米粒度及Zeta电位分析仪_flyer_CN_v4.0 |
| 4 | | PSS_Nicomp_3000_粒度分析仪系列_Brochures_V4.4 |
| AccuSizer 780 系列彩页 | ||
| 序号 | 文件类型 | 下载链接 |
| 1 | | PSS_780合集_Brochures_CN_v3.0 |
| 2 | | PSS_不溶性微粒专题_flyer_CN_v3.0 |
| 3 | | PSS_粒度仪在医药行业的应用_flyer_CN_v3.0 |
| 4 | | PSS_A2000_SIS_不溶性微粒检测仪_flyer_CN_v4.0 |
| 5 | | PSS_A7000_APS_大乳粒检测仪_flyer_CN_v4.0 |
| 6 | | PSS_A7000_AD_多功能自动计数粒度仪_flyer_CN_v4.0 |
| 7 | | PSS_FMS_flyer_CN_v3.0 |
8 | | PSS_AccuSizer_2000_不溶性微粒分析仪系列_Brochures_V4.4 |
| 9 | | PSS_AccuSizer_7000_计数粒度分析仪系列_Brochures_V4.4 |
| 10 | | PSS_AccuSizer_9000_高浓度纳米颗粒计数器系列_Brochures_V4.4 |
| 11 | | PSS_FMS_在线粒度仪系列_Brochures_V4.4 |
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