纳米粒和自动滴定Nano_ZS

1、CONTENTS lZetasizer range l光相关光谱Photon Correlation Spectroscopy (PCS) KPCS 理论概述 K马尔文高灵敏的粒度仪 Zetasizer (HS) 系列介绍 K专利的最新型检测器，激光功率多种选择 lZeta 电位 KZeta 电位理论概述 K多用途滴定器 (MPT-1) KNew Zeta Potential Transfer Standard (DTS0050) THE ZETASIZER RANGE l用微量电泳法测定水和非水体系中粒子的Zeta 电位 KZeta 电位可权威地预测分散体系(悬浮液，乳化液) 的长期稳定性

2、l用光相关光谱测量分散体系中粒径分布 世世 界界 顶顶 级级 纳纳 米米 颗颗 粒粒 和和 大大 分分 子子 特特 性性 分分 析析 仪仪 器器 纳米粒度及纳米粒度及 Zeta电位分析仪电位分析仪 新一代新一代Zetasizer Nano ZS 位于英国的马尔文公司总部 英国马尔文仪器有限公司英国马尔文仪器有限公司 _ _激光粒度分析仪的创始人 激光粒度分析仪的创始人 - - 世界上最大的激光粒度分析仪专业设计和生产厂家世界上最大的激光粒度分析仪专业设计和生产厂家 - - 世界上第一台相关处理器世界上第一台相关处理器 - - 世界上第一台激光衍射法粒度分析仪，世界上第一台激光衍射法粒度分析仪，

3、 - - 世界上第一台激光世界上第一台激光PCSPCS粒度分析仪粒度分析仪 - - 世界上第一台超声粒度分析仪世界上第一台超声粒度分析仪 - - 销售量占世界第一，仅中国大陆已有销售量占世界第一，仅中国大陆已有600600台以上台以上 - - 已获得已获得ISO9001ISO9001标准标准, , 欧洲欧洲EMCEMC标准认证标准认证, GMP, GMP标准认标准认 证，唯一完全符合美国证，唯一完全符合美国FDA QSpecFDA QSpec要求要求 - - 多方位应用支持，在中国设立正式技术服务中心多方位应用支持，在中国设立正式技术服务中心 . . . 马尔文光子相关光谱仪的发展马尔文光子相

4、关光谱仪的发展 Size distribution(s) 51050 1005001000 Diameter (nm) 5 10 % in class Zave = 3.6nm 世界第一台 PCS纳米粒 度分析系统 (1970年) 1970年, 马尔文数字相关器， 一个革命性的光子交叉相关(PCCS) 数字信号处理系统，在皇家信号 与雷达军工实验室（Royal Signals and Radar Establishment）开发成 功。世界第一台商用激光粒度分 析仪及马尔文仪器公司随之诞生， 并成为激光粒度分析仪技术的先 锋。随后进一步开发了动态光散 射的光子相关（PCS）亚微米测量 技术。

5、Zetasizer 1000, 2000, 3000 (1997年) ZETASIZER 1000 Size measurement at 90 deg. 2nm to 3 microns ZETASIZER 2000 Zeta potential measurement of particles of 5nm to 30 microns size in aqueous and non aqueous systems ZETASIZER 3000 Combination of 1000 and 2000 plus size measurement at 12 deg. ZETASIZER 10

6、00 and 2000 can be upgraded to 3000 ZETASIZER Series lZETASIZER 1000 and 2000 can be upgraded to 3000 Zetasizer HS系列 纳米粒度及Zeta电 位分析仪和MPT-1 自动滴定系统 (1999年) The MPT-1 是为是为Zetasizer分析仪特制的高效专用自动滴定装置分析仪特制的高效专用自动滴定装置 粒径范围：2 nm 3000 nm 专利高灵敏测量系统,下限测量无须高 功率激光器。 2000年最新M3专利技术，具有高分辨 高准确性，可分辨混合粒子1mV的Zeta电 位差异。

7、突出的高重现性，由精确的内部温控技 术和在线pH测量加以保证。 全自动三元滴定系统：精确控制、实时 测量pH，盐浓度和电导率的连续变化。 全自动结果自诊断系统：结果判断因子 (RQF) 保证了每次测量质量。 内置ISO13321标准指导操作。 THE ZETASIZER RANGE INTENSITYZETASIZE 型号 测量范围 PARAMETER MEASURED YES YES YESNO NO YES YES YES NO NO YESYES 90o FIXED ALIGNMENT 1000 1000HS S90 Nano S 5 to 3000nm 2 to 3000nm 0.6

8、to 6000nm 2 to 3000nm The New Zetasizer Nano series Size KMeasurement of colloids, emulsions and molecules KHigh sensitivity and high concentration Zeta potential KZero maintenance zeta potential measurement Molecular weight KProteins and polymers 5 new instruments New Zeta Size (backscatter) New Ze

9、ta burning the polymer out during firing causes shrinkage and voids and in addition is costly. KImproving the dispersion using electrostatic forces may involve merely changing the concentration of a few ions in the system. KThis will potentially lead to denser and hence stronger and more consistent

10、product Mineral processing (1) lA large proportion of the separation of useful minerals from the useless 慻angue?is done using a technique called 慒roth flotation KThe mineral is finely ground, added to water and the environment modified such that the target mineral will adhere to collector oils bubbl

11、ed through the dispersion. KThe oil and mineral float to the surface to be skimmed off. KThe conditions can now be modified to float a different mineral Mineral processing (2) lThe controlling parameter that determines the efficiency of this process is the zeta potential. KBy measuring the zeta pote

12、ntial the optimum conditions and concentration of additives can be determined to maximise recovery efficiency KZeta potential can also be used to study the effect of various pretreatment regimes that are used to maximise recovery Drinking Water and Waste Water Treatment lEach treatment plant has its

13、 own regime to remove contaminants from local source water or domestic waste water KUsually a combination of changing the pH , adding electrolytes and polyelectrolytes is used to minimize the turbidity of the water. KAn increase in turbidity indicates that the treatment process needs changing, howev

14、er it does not help with what changes in treatment are required to reduce turbibidity. KIf the source water changes regularly, measurement of the zeta potential in combination with other parameters such as conductivity and pH, can be used to determine the treatment required. Non-aqueous systems lThe

15、re are a number of commercially important dispersions where the dispersing medium is non polar. This is commonly dodecane, Isopar G or hexane. KTypical systems are liquid copier toners and inks. KAs non-polar liquids contain few ions, electrostatic stabilization requires the addition of charge enhan

16、cing agents as dispersants. KMeasuring zeta potential helps with selecting the best dispersant and addition of the correct quantity. KMeasuring the zeta potential of these systems requires a specialized cell. The DTS5002 cell for the Zetasizer 2000/3000 and the ZET5126 cell for the Zetasizer 5000 产品

17、质量保证及售后服务 l获ISO9001 证书 lGMP 工厂 l中国保税库 l售后服务：24小时响应，48小时到现场。 l保修：一年保修 l免费安装调试，仪器操作培训 WHAT DOES A PCS INSTRUMENT CONSIST OF? Pinhole Detector (Photomultiplier/ Avalanche Photo Diode) Laser Sample containing particles Computer containing correlator card (7132) Scattered light Zetasizer HS (High Sensiti

18、vity) instruments contain an APD detector THE INTENSITY OF SCATTERED LIGHT The intensity of scattered light obtained from a dispersion of particles is dependent upon Laser wavelength Particle size www.malvern.co.uk BROWNIAN MOTION AND SCATTERED LIGHT Many scattered beams interfere with one another r

19、esulting in a very complex intensity pattern of speckles Screen Consider many particles www.malvern.co.uk 用PCS测量小粒径时 l通常牺牲准确性，用增加激光能量来提高散射光 强度 l若保持低能量激光，则因重复计算，导致结果正 误差。 WHATS NEW ABOUT THE APD USED IN THE ZETASIZER? l过去的APD价格昂贵可靠性差，尽管灵敏度高 l马尔文专利的新型APD，使用一种新型材料 突出的优越性： K提高了可靠性，达到灵敏度与可靠性的统一 K减化操作 K缩短

20、稳定时间(Improved settling time from power up) 应用实例: Absorbing systems z- 平均粒径平均粒径 (nm) 多分散度多分散度 测定时间测定时间 分分 计数率计数率 (KCPS) 18.4 18.4 18.4 345.4 346.0 346.1 180.4 179.3 181.2 177.3 177.5 178.4 0.246 0.221 0.224 0.198 0.212 0.212 15 15 15 2 2 2 RUN 1 2 3 4 5 6 检测器检测器 PM PM PM APD APD APD 4 mW He-Ne laser 测碳黑样品测碳黑样品 计数率越高越好，结果重复性越好计数率越高越好，结果重复性越好 Applic