纳米粒度及Zeta电位分析仪
仪器介绍
NanoBrook Omni是一个可配置的颗粒尺寸和齐塔电位测量平台。该仪器包括基于动态光散射（DLS）原理的颗粒尺寸和分布测量、基于多普勒测速法（电泳光散射或ELS）的ζ电位测量以及低迁移率样品的相位分析光散射（PALS）测量。
参数
| General specifications | |
| Laser | Standard laser 40 mW red diode laser, nominal 640 nm wavelength |
| Condensation control | Purge facility using dry air or nitrogen |
| Temperature control | -5°C to 110°C, active control. No external circulator required |
| Specifications for particle sizing at 90° | |
| Sample type | Most nanoparticle, and colloidal-sized materials, in any non-absorbing liquid |
| Size range | 1 to 3 mL disposable plastic, 50 µL disposable, 40 µL quartz flow cell, 10 µl quartz minimum |
| Concentration range | 2 ppm to 50 mg/mL |
| Signal processing | Dynamic Light Scattering (DLS) |
| Correlator | Brookhaven’s TurboCorr, multitau, research grade with 510 hardware channels, covering the equivalent of 1010 linearly-spaced channels, 100% efficiency, real-time operation over the entire delay-time range |
| Precision | ±1% typically |
| Scattering angle | 90° |
| Data presentation | Average & width, lognormal fit, and multimodal size distribution standard |
| Test standards | Conforms to ISO13321 and ISO22412 |
| Specifications for particle sizing at 173° | |
| Sample type | Most globular proteins, nanoparticles, and small polymers in any non-absorbing liquid |
| Size range | <0.3 nm to 10 µm diameter |
| Sample cells | 50 µl disposable, 1 to 3 mL disposable plastic, glass, or quartz cells |
| Concentration range | 0.1 ppm to 50 mg/mL |
| Specifications for zeta potential | |
| Sample type | Most nanoparticle, polymer and colloidal-sized materials, suspended in any non-absorbing liquid, with relative permittivity > 20 and viscosity 1.5 and viscosity < 30 cP PALS |
| Size range suitable for zeta measurement | 1 nm to 100 µm |
| Mobility range | 109 to 107 m2 /V•s ELS; 1011 to 107 m2 /V•s PALS |
| Zeta potential range | -500 to 500 mV |
| Sample cells | 180 µL, 600 µL, 1250 µL |
| Maximum sample conductivity | 220 mS/cm |
| Signal processing | Sizing: Dynamic Light Scattering (DLS), Zeta Potential: Electrophoretic & true Phase Analysis Light Scattering (ELS & PALS) |
| Precision | ± 3% |
| Scattering angle | 15° |
| Data presentation | Doppler Frequency Shift (ELS), Phase (PALS), electrophoretic mobility, zeta potential using Smoluchowski, Hückel, or Henry |
| Concentration range | 40% v/v |