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Instant Coffee - PowerPoint PPT Presentation

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Instant Coffee
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  1. Instant Coffee Lauren Shermer & Genevieve Day

  2. Instant Coffee • Derived from brewed coffee beans • The Japanese were the first to produce a stable instant coffee product in the early 1900s • During World War II, instant coffee gained fame among American soldiers after Nestlé marketed its Nescafé brand • Can also be used as a homemade black and white photograph developer

  3. Freeze Drying Process • Coffee beans are roasted and then brewed in hot water • Oxygen and insoluble particles such as coffee grounds are removed • Next, the coffee is sits and the water evaporates naturally leaving a concentrated coffee solution. • This concentrate is then frozen to around 69.4 degrees Fahrenheit. • The remaining water freezes into ice crystals. Sublimation is used to remove the ice • What's left is dry granules of instant coffee. • Because of this process, instant coffee has a longer shelf life compared to freshly ground coffee beans

  4. Decaffeination Process • Coffee beans are still in green state • The decaffeination process occurs prior to freeze drying or spray drying • Removes 97% to 99% of caffeine • Coffee must contain 3% of caffeine or less to be classified as decaffeinated • It is impossible to create a coffee that is100% caffeine free

  5. Elements Found in Instant Coffee • Various elements are found in different types of raw coffee beans. • Different elements and compounds produce different blends and strengths of coffee • In many blends of instant coffee the following elements are present: • Carbon • Hydrogen • Oxygen • Nitrogen • Potassium • Lead

  6. Compounds found in Coffee • There are over 200 chemical compounds found in raw coffee beans including • Caffeine • Arcylamide • 4-Methylimidazole • 4-(4-hydroxyphenyl)-2-butanone • Gives coffee a sweet and fruity aroma

  7. Caffeine • Caffeine is one of coffees major components, there is about 57 mg per 8oz. cup of instant coffee. • There is less caffeine in instant coffee than in brewed coffee • Molecular Formula: C8H10N4O2 Caffeine is composed of the following elements: • Nitrogen • Carbon • Hydrogen • Oxygen 4 Nitrogen 8 Carbon 10 Hydrogen 2 Oxygen

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  9. Carcinogenic Ingredients Some blends of coffee may contain small amounts of compounds identified as carcinogens by the US National Toxicology Program, including • Acrylamide • 4-methylimidazole

  10. Arcylamide • Acrylamide is a known lethal neurotoxin • Used as binding, or thickening agents in • Grout • Cement • Sewage treatment • Pesticide formulations • Cosmetics • Sugar manufacturing • Food packaging and plastic products • Acrylamide levels appear to rise as food is heated for longer periods of time • Molecular Formula: C3H5NO 3 Carbon 5 Hydrogen Nitrogen Oxygen

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  12. 4-Methylimidazole • Molecular Formula: C4H6N2 • Used for caramel coloring • Composed of the following elements: • Nitrogen • Hydrogen • Carbon Nitrogen Carbon Hydrogen

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