Estimating the Vitamin C Concentration in Fruit Juices: A Redox Titration Prelab Assignment – Please turn your answers in on GaView prior to lab 1. How will you prepare a .02% (m/v) NBS solution? Calculations should be in your notebook before arriving to lab. 2. Provide the structure of vitamin C in its reduced form (ascorbic acid)‚ its ionized form (ascorbate ion- this is at equilibrium with reduced form when dissolved)‚ and its oxidized form (dehydroascorbate). 3. Why do you
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Investigating Vitamin C Background Vitamin C is found in green vegetables‚ fruits‚ and potatoes. It is essential for a healthy diet. The chemical name for vitamin C is ascorbic acid. Ascorbic acid is a good reducing agent and therefore it is easily oxidised. Methods for the detection of vitamin C involve titrating it against a solution of an oxidising agent. Where to start There are several oxidising agents that can be used and a commonly used one is 2‚6-dichlorophenol-indophenol or DCPIP
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tamin C‚ ascorbic acid‚ is one of the most important vitamins found in citrus juices‚ including orange juice. Often projects find that orange juices made from frozen concentrated orange juice (FCOJ) have the highest vitamin C levels as compared to freshly squeezed or not-from-concentrate (NFC) juices. This is probably due to the fact that vitamin C degrades over time in fresh and NFC‚ but doesn’t degrade as much in FCOJ due to it being frozen until reconstitution. If one is comparing a NFC product
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Soluble Vitamins Anna Gamblin‚ UOP Both fat soluble and water soluble vitamins are nutrients that a person needs in their diet to keep up to optimal health. Vitamins and minerals are an essential necessity that our bodies need to function properly every day. Different vitamins do different things for us‚ but all are very important. You can get these different vitamins either through a balanced‚ nutritious diet‚ dietary supplements or a combination of the two. The two kinds of vitamins that are
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: THE VITAMIN C CONTENT OF FRUIT JUICES AND TABLETS DATE OF EXPERIMENT : 1ST AUGUST 2013 DATE OF SUBMISSION : 27TH AUGUST 2013 LECTURER : PUAN ZAKIAH BT. ZAKARIA OBJECTIVE * To determine the vitamin C content in fresh fruit juice * To determine the vitamin C content in commercial fruit juice * To determine the vitamin C content in tablet
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Fat Soluble Vitamins and the Body Humans need a number of vitamins in their body to survive. A group of the vitamins needed for vitality include the fat soluble vitamins‚ which includes vitamins A‚ D‚ E‚ and K. Deficiency in these vitamins is rare‚ but rather‚ over consumption is the problem often associated with these vitamins. Fat soluble vitamins are vitamins that are stored in fatty tissues and in the liver. These vitamins‚ unlike water soluble vitamins‚ are stored for long periods of
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Water-Soluble and Fat-Soluble Vitamins Fat and Water-Soluble Vitamins The vitamin classification is defined as water-soluble vitamins and fat-soluble vitamins. Vitamins are an important part of our diet‚ as they help with bodily functions and provide defense mechanisms for our immune system. You only need very small quantities but if you don ’t get enough your body cannot function optimally. Severe deficiencies cause debilitating diseases but even marginal intakes can cause subtle changes
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Vitamin D Vitamin D: Wonder Pill or Overkill? Wouldn’t it be great if one vitamin could build stronger bones and protect against diabetes‚ multiple sclerosis‚ cancer‚ heart disease‚ and depression? Or even help you lose weight? Researchers have high hopes for vitamin D -- which comes from our skin’s reaction to sunlight‚ a few foods‚ and supplements. Learn the facts in the slides ahead … and see who’s at risk for a "D" deficiency. Vitamin D Boosts Bone Health Vitamin D is critical for strong
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Vitamin K is a fat-soluble vitamin that is required for blood clotting and to prevent hemorrhaging. It also plays a role in bone formation and repair. Deficiencies can occur with inadequate dietary intake‚ malabsorption syndrome‚ chronic liver disease and in patients taking antibiotics. There are several forms of vitamin K‚ including K1‚ K2 and K3. K1 is the form found in plants such as spinach‚ broccoli‚ cabbage‚ and cauliflower. Vegetable oils such as olive and soybean also contain small
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Vitamin C –A Natural Antioxidant Concept: Vitamin C (ascorbic acid) is an antioxidant. The amount of vitamin C content in food can be found out by titrating with an oxidising agent‚ e.g. iodine. In the reaction‚ vitamin C is oxidised‚ while iodine is reduced to iodide ions. The endpoint is determined by the formation of blue-black starch-iodine complex when all vitamin C is oxidised and excess iodine is free to react with the starch solution added as indicator. Introduction Vitamin C is an
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