Physical Chemistry

Within this area we not only provide you with single parameters but also with extensive evaluations like polymorphism studies, stability studies, surface evaluations and many more.

 

Solids

Thermal Methods

  • DSC
  • thermogravimetry (TG)
  • high sensitivity isothermal calorimetry
  • depolarization
  • vapor pressure (10-5 Pa to 100 kPa, R.T. to 400 °C,
    also very high precision from 0.1 Pa to 1 kPa)

Dynamic Vapor Sorption

 

X-Ray Powder Diffraction

  • controlled temperature
  • controlled atmosphere (gas or humidity)

 

Coupled Methods

  • TG-FTIR
  • IR-microscopy
  • hot stage Raman- microscopy
  • hot stage microscopy


Particles/Formulations

 


Particle Sizing

  • laser light diffraction
  • quasi-elastic light scattering
  • sieving
  • disc-centrifugation
  • gas sorption methods
  • He- and Hg-density, tapped density
  • specific surface


Electrokinetic Sonic Amplitude


Zeta Potential

 

 

Surfaces

Microscopy

  • light microscopy
  • SEM, TEM, EDX elemental analysis (mapping)
  • image processing

Ellipsometry
 

Contact Angle Measurements

 

 


Molecular Properties and Interactions

 

Analytical Ultracentrifugation

 

Titration Calorimetry

 

Spectroscopy

  • IR (incl. ATR), Raman
  • NMR
  • UV/VIS/NIR
  • reflectance spectroscopy
  • fluorescence, phosphorescence (time resolved and stopped-flow)
  • chemiluminescence
  • singlet oxygen
  • polarimetry, ORD
  • CD


Physicochemical Constants

  • density
  • viscosity
  • logP
  • conductivity
  • solubility
  • surface tension
  • refractive index
  • osmotic pressure
  • melting point
  • specific heat


Rheology: η’(ω),η’’(ω)

  • oscillation experiments
  • yield stress
  • creep recovery

Radiometry

  • EN 45001 certified
  • IR-camera


Model calculations

  • kinetics
  • diffusion
  • multiple equilibria
  • optimal spectral properties

 

Polymorphism, Salts and Crystallization 

  • comprehensive salt- & polymorphism screening
  • find all relevant forms
  • polymorphic purity
  • complete characterization
  • patent life extension
  • free energy - temperature diagram

 

Optimization of Processes 

  • distillation
  • crystallization
  • lyophilization
  • drying

 

Quality control 

  • single parameters
  • packages

 

Preformulation Characterization 

 

 

Binding Studies

  • K, k, ΔG, ΔH, ΔS, stoichiometry
  • protein/drug, protein/protein, nucleic acid/drug etc.

 

Structure of Biomaterials

  • structure of biomacromolecules and cell components
  • preparation techniques (e.g. staining, immunolabeling)

 

Stability Studies of Active Substances and Formulations

  • thermal stability
  • light stability
  • hydrolytic stability

 

Formulation Development

  • suspensions
  • creams
  • parenteral dosage forms etc.

 

Surface Characterization

  • surface morphology and roughness
  • surface energy
  • surface functionalization and patterning

 

Properties of Macromolecules (biological/technical)

  • molar mass, size, selfassociation
  • sedimentation coefficient
  • protein denaturing/folding

 

Application Properties

  • spectra, colors, activities
  • quantum yields (fluorescence, photoreactions, phosphorescence, chemiluminescence)

 

Application Problems: Causes and Remedies

  • photostability/photodegradation
  • thermal/chemical stability/degradation
  • discolorations/yellowing

 

Calibration of Light Sources and Detectors

  • absolute spectral calibration
  • calibration on-site
  • consulting for medical and technical irradiation setups 

 

 IR-Thermography/2-dimensional
Analysis of Heating Effects

  • screening of exothermal reactions in microtiter plates
  • heat dissipation on chemical production sites

 

Consulting

  • optimal processing of experimental data (e.g. kinetic analyses)
  • strategies in medical diagnostics

 

Contract Research

  • development of new formulations
  • improvement of diagnostic sensitivity
  • HTS strategies
  • rapidly decaying drug-carriers

Crystals in hot stage microscope 

Crystals in hot stage microscope

«Fingerprints» of a solid revealed by powder X-ray diffraction

«Fingerprints» of a solid revealed by powder X-ray diffraction

Contact

Please contact us for
more information
info@solvias.com

Phone:

 

+41 61 686 61 61

Download

Physical Chemistry
(pdf)