4 research outputs found
Constructing a Cenicafe Rake for Stirring Deck-dried Coffee
The CenicafƩ rake can shorten the time needed to dry coffee on a sun deck by a day and increase the uniformity of drying to that of rotary drum dryers. Instructions for constructing one are given
Measuring Coffee Bean Moisture Content
Why, how, and when to measure coffee bean moisture content is discussed
Isotopes as Tracers of the Hawaiian Coffee-Producing Regions
Green coffee bean isotopes have been used to trace the effects of different climatic and geological characteristics associated with the Hawaii islands. Isotope ratio mass spectrometry (IRMS) and inductively coupled plasma mass spectrometry ((MC)-ICP-SFMS and ICP-QMS) were applied to determine the isotopic composition of carbon (Ī“<sup>13</sup>C), nitrogen (Ī“<sup>15</sup>N), sulfur (Ī“<sup>34</sup>S), and oxygen (Ī“<sup>18</sup>O), the isotope abundance of strontium (<sup>87</sup>Sr/<sup>86</sup>Sr), and the concentrations of 30 different elements in 47 green coffees. The coffees were produced in five Hawaii regions: Hawaii, Kauai, Maui, Molokai, and Oahu. Results indicate that coffee plant seed isotopes reflect interactions between the coffee plant and the local environment. Accordingly, the obtained analytical fingerprinting could be used to discriminate between the different Hawaii regions studied