posted on 2018-10-05, 10:19authored byKankanit Khwanpruk
This PhD thesis is concerned with improving the retention of volatiles in the
manufacture of instant coffee powders. Two processes have been studied in
depth: spray drying and spray freeze drying. Spray freeze drying consisted of a
combined spraying and freezing operation, followed by sublimation in a fluidised
bed under partial vacuum. The aroma quality was measured using headspace solid-phase micro-extraction (HS-SPME) technique followed by gas
chromatography coupled with mass spectrometry (GC/MS). Experiments were
also performed with maltodextrin as the encapsulating matrix for comparison. [Continues.]
Funding
Thailand, Ministry of Science. King Mongkut's Institute of Technology Ladkrabang (Thailand).
History
School
Aeronautical, Automotive, Chemical and Materials Engineering
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Publication date
2007
Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.