Calorimetry
A VP-ITC Differential Scanning Microcalorimeter with a Pressure Perturbation Calorimetry accessory from MicroCal (GE Healthcare) was purchased in 2010. This is a sensitive microcalorimeter for samples in solution. The instrument has an active cell volume of ca 0.5 ml, and it operates for temperatures between –10ºC to +130ºC. The cells consists of non-reactive Tantalum 61™ for excellent chemical resistance, and they are fixed-in-place for reproducible ultrasensitive performance with low maintenance. The systems uses a Peltier element for precise temperature control. It allows for user selectable temperature scan rates (0ºC to 90ºC per hour upscans), enabling for studies of fast or slow transition processes.
Sponsored by The Knut and Alice Wallenberg Foundation.
Contact
Contact person: Emma Sparr
* A VP-ITC Isothermal Titration Microcalorimeter from MicroCal (GE Healthcare) was purchased in 2010.This is a ultrasensitive microcalorimeter for samples in solution. The instrument has an active cell volume of ca 1.4 ml, and it operates for temperatures between 2ºC to 80ºC. The cells consists of non-reactive Hastelloy® for excellent chemical resistance, and they are fixed-in-place for reproducible ultrasensitive performance with low maintenance. The system include precision liquid delivery system for accurate and reproducible injections and user-selectable mixing speeds to match sample conditions.
Sponsored by The Knut and Alice Wallenberg Foundation.
* Isothermal titration microcalorimeter 2277 TAM Thermal Activity Monitor System.
Contact
Contact person: Emma Sparr
The energy released as heat by a process is directly proportional to the rate of reaction and by monitoring the reaction in a calorimeter detailed kinetics can be revealed. In 2011 we got a Chemical Process Analyser CPA202 from Chemisens. It is a high precision factory pre-calibrated calorimeter made in Hastelloy C276 with a useful volume of 10 – 180 ml, which can be continuously varied during experiments. The temperature range for experiments is -50 °C to +200 °C and it is possible to operate in a pressure range from vacuum up to 20 bars. The temperature resolution for an experiment is 0.001 °C and the power resolution is 0.001 Watt in the standard reactor and in the so called HighSens Reactor, which will be used for e.g. adsorption kinetics, crystallization, dissolution of tablets and micellization it will be possible to perform studies with a power resolution of 0.1mW at a volume of 10 – 180 ml.
Sponsored by The Knut and Alice Wallenberg Foundation.
Contact
Contact person: Ola Karlsson
A double twin isothermal microcalorimeter for the simultaneous determination of sorption isotherms and differential sorption enthalpies of vapors on solids. The instrument is developed in-house by L Wadsö and N Markova.