Analysis of liquids at temperatures above boiling ?

Analysis of gases in your samples?

HR-US Pressurising System

For HR-US Series of High Resolution Ultrasonic Spectrometers

PROVIDES ADDED FUNCTIONALITY AND NEW APPLICATIONS FOR HIGH-RESOLUTION ULTRASONIC SPECTROSCOPY

High Resolution Ultrasonic Spectroscopy (HR-US) is a novel technique for non-destructive material analysis based on precision measurements of parameters of high-frequency sound waves (velocity and attenuation), propagating through analysed samples. These waves propagate through most materials including opaque samples and allow direct probing of intermolecular forces. Award winning range of HR-US ultrasonic spectrometers from Ultrasonic Scientific provide an unprecedented set of new analytical capabilities for research, product development, quality and process control in biotech, pharmaceutical, food, chemical and petrochemical, polymer and other industries. Applications include analysis of chemical reactions, conformational transitions in polymers and biopolymers, aggregation and gelation phenomena, particle sizing, phase transitions, stability of emulsions and suspensions, formation of micelles and CMC measurements, ligand binding, composition analysis and many others.

The HR-US Pressurising System provides pressurisation of samples analysed with High-Resolution Ultrasonic Spectrometers. The standard unit has an internal compressor delivering a desired pressure to each of two cells of HR-US Spectrometers. Cells can be pressurised independently or simultaneously for differential measurements. Pressure is displayed on the front panel of the unit and is controlled by a regulator valve. Two individual pressure outlet lines allow the user to set different pressures in each cell if required. Each pressure line has an isolating valve and the pressure in each cell is displayed by individual pressure gauges. The unit has a gas inlet which can be plugged to an external gas line thus allowing to pressurise the samples with required gas.

The HR-US Pressurising system (left) in combination with HR-US 102 ultrasonic spectrometer (right) is a powerful tool for users that need to analyse samples at pressures above 1 atmosphere.

Bubble Suppression

The unit provides a simple and effective method to suppress the formation of bubbles in liquids saturated with gases, which may otherwise occur in foam forming liquids and dispersions or other liquids during temperature ramps. By eliminating bubble formation the samples can be characterised by the Ultrasonic Spectrometer in their pure, bubble-free state. Typical applications are analysis of formation of micelles and composition analysis in solutions of surfactants, heat-induced conformational changes in polymers, kinetics of chemical reactions with gas producing products/reactants, etc

Analysis of liquids with low boiling points

By applying pressure to liquids in the sample cell the boiling point of the liquid is effectively increased, retaining the sample in its liquid state at temperatures above its normal boiling point. This has many practical applications such as the characterisation of aerosols and other liquids normally stored under pressure. Typical applications are analysis of sedimentation processes in pharmaceutical inhalers, microstructural and molecular transformations during high-temperature sterilisation of food systems, etc.

Analysis of solubility of gases

Pressurising of sample with a particular gas increases the solubility of this gas in the sample. Concentration of dissolved molecules of gas at different pressures can be calculated from the measured ultrasonic parameters of the sample. Typical applications are analysis solubility of gases in pure liquids, emulsions, etc.

Analysis of gas bubbles in liquids

External pressure applied to a liquid containing gas bubbles changes the volume of gas bubbles, which affects ultrasonic parameters (velocity and attenuation) of the sample. Dependence of ultrasonic parameters on pressure allows determination of the amount of gas incorporated in the sample and characterisation of the size of gas bubbles. Example application is analysis of gas bubbles incorporated into food dispersions

Specifications

Maximum Pressure:

HR-EX-PS-2.5 -PS-2.5 HR-EX-PS-5

2.5 Bar 5 Bar

(extended pressure range on request)

Number of outputs

2

Operating Voltage

110 to 240 VAC, 50/60 Hz

Size	W 26 cms X H 14 cms X D 30 cms

Ordering Information

HR-EX-PS-2.5 or HR-EX-PS-5

HR-US Pressurising System, dual line with accessories.

This technology is protected by granted patents and pending patent applications