A Laboratory Technique for Separating Glucose Monohydrate Crystals from Candied Honey

Ng, Corrin (2006). A Laboratory Technique for Separating Glucose Monohydrate Crystals from Candied Honey Honours Thesis, School of Engineering, The University of Queensland.

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Author Ng, Corrin
Thesis Title A Laboratory Technique for Separating Glucose Monohydrate Crystals from Candied Honey
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2006
Thesis type Honours Thesis
Supervisor Edward Ted White
Total pages 39
Language eng
Subjects 0904 Chemical Engineering
Formatted abstract
In the past, the studies of the growth rates of glucose monohydrate crystals in honey were hindered because the high viscosity of honey makes crystal separation difficult. The main focus of this thesis is to perform a separation by settling the crystals from honey using a centrifuge while ensuring that the crystal size distribution does not change. Limitations of the method can be determined by considering extreme conditions and observing how the size distribution of the crystal is affected.

In order for a good separation to take place, factors such as the operating conditions of the centrifuge and the re-suspending vortex mixer must be taken into careful considerations. The best separation technique gives clean, free-flowing and unbroken crystals with unchanged size. Glucose Monohydrate (6 wt %) was mixed with honey. Samples were taken and put into a centrifuge to cause the Glucose Monohydrate crystals to settle to a plug so that the honey can bedecanted off. The crystal plug was re-suspended in a 10% v/v water in ethanol solution saturated with Glucose Monohydrate using a vortex mixer. This suspension was then centrifuged and vortex mixed for a second time before clean, free-flowing crystals were obtained. The Glucose Monohydrate crystals were then sized using the Malvern Mastersizer/E to see if the size distribution had changed.

The procedure was shown to be successful, with good separating conditions being a centrifuge speed of 10,000 rpm for 28 seconds and vortexing at power = 6 for 1 minute. This achievement of separating Glucose Monohydrate crystals successfully from honey would pave the way for the developments in measuring the crystallisation rates of Glucose Monohydrate from candied honey in the future.
Keyword Glucose Seperation

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
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Created: Fri, 19 Dec 2014, 12:19:31 EST by Asma Asrar Qureshi on behalf of Scholarly Communication and Digitisation Service