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Zetasizer Nano ZS – ZEN3600 is equipped with red He-Ne laser operating at wavelenght of 633 nm. The Dynamic Light Scattering (DLS) with the scattering angle of 12 or 175° is used to determine particle size ranging from 0,3 nm to 10 m. The Electrophoretic Light Scattering (ELS) is used to determine zeta potencial for sizes from 3,8 nm to 100 m. The indirect DLS or Static Light Scattering (SLS) techniques measure molecular weight ranging from 1000 Da až 2 x 107 Da. The MPT-2 Autotitrator with Vacuum Degasser allows zeta potential, size or intensity measurements to be made while adding titrants during different types of titration.