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If you do not want to get scurvy, please do not store your orange juice in a copper pan, in a hot place, with a lot of oxygen in great sunlight. That ability of donating/taking electrons is one of the major functions of vitamin C in the body. Since both dehydroascorbic acid & ascorbic acid are relevant for the human body, generally the overall vitamin C content is the sum of these two added up. How can it be that when i look up dehydroascorbic acid that i get C6H6O6 and not C6H7C6 what i see in this article. This site uses Akismet to reduce spam. I’ll at least stick with eating oranges and other fruits to get my vitamin C . 16 oz is around 3x more juice than is recommended for 1 portion to be classed as 1 of your 5-a-day. Some great questions, years back I actually did a school project about vitamin C in fruit juices as well, so exciting to hear you’re testing it as well! It does so (as does any acid) by increasing the concentration of proton (H +) in the water. At home it is important to store orange juice in a closed bottle if not using it all directly. In the case of calcium look for calcium chloride (CaCl2). Baking soda (to increase pH) or lemon juice (to decrease pH value): would pH impact the stability of vitamin C, Time: yes, time definitely has an impact! D&C Orange No. We call this an oxidation reaction, ascorbate is oxidized, losing some of its electrons. Thank you for your question and apologies for the late answer. I am not 100% sure why it is added, but I believe it has to do with pH adjustments at the start of the titration (see also)! Personally, I get all my vitamin C from fruits and vegetables which contain a lot of it. Consuming the recommended amount of orange juice with zero added sugar has been found to have no association with the development of type 2 diabetes in many literature reviews. This would look something like (in reality it is a little more complex with other reactions going on involving radicals but they have been left our simplicity): C6H7O6– (ascorbate) ↔ C6H6O6 (dehydroascorbic acid) + 2 e– + H+. Some substances in orange juice: Protein (g) 0.70 Since the pH of an orange is around 3-4, orange juice is actually quite a nice place for this reaction to occur. Yes the vitamin c is imperative for me as I can’t take ascorbic acid supplements and need the extra c for lyme. A A compact disc is a solid material that contains more than one element, with regions of different compositions visible along its edge. I’d suggest you use it quickly. Your body turns nitrates into nitric oxide. Hence, if no oxygen is present, less oxidation of ascorbic acid will take place. It does so (as does any acid) by increasing the concentration of proton (H+) in the water. which degrades faster. However, I would not recommend adding it back yourself since orange juice is such an unstable system. Three, you can dissolve crumbled cat litter in gasoline until the mixture is thick. Beet juice is high in nitrates. C6H7O6– (ascorbate) ↔ C6H6O6 (dehydroascorbic acid) + 2 e– + H+. Hi, I had a question about vitamin c when mixed with ground eggshell. Citrus products. You probably know the chemical formula for water: H 2 0. The lack of water prevents most chemical reactions from occurring. If you’re looking at testing calcium or sodium, I’d add them inthe easiest/cheapest form available. It sounds like u are saying that the reaction itself doesn’t kill the c, merely makes it ascorbate (or is it citrate since it’s lemon juice?) As described in the post, once the ascorbic acid has reacted it will become ascorbate. Why would this be? Once it’s ascorbate, it is likely to react in all sorts of different pathways and thus lose the vitamin C functionality. Orange juice is a mixture of many things, most of all water, sugar, and citric acid. Orange juice is a mixture, it does not have a chemical formula. I want to be certain the C is still usable. You state you use the eggshell as a calcium supplement, is it therefore essential that the lemon juice contains vitamin C for you or could you eat/drink enough other foods to ensure enough vitamin C? As long as the orange is whole, no reaction will take place though, it’s protected from oxygen and light and all cells are still in tact. Dehydroascorbic acid is simply less stable and most likely harder to control. Comparing 1 orange to a 16 oz glass of orange juice is very misleading. by Nick Meyer | July 20, 2020 . H2SeO4. It’s likely to be more efficient than adding them to your juice. Talking about the ascorbic acid as powder, does it suffers oxydation too over time? The higher the temperature, the more atoms and molecules will move around. In your body as well as in a lot of food systems the most prevalent form of vitamin C is ascorbate, not ascorbic acid. Preventing scurvy is just one of the many reasons that vitamin C helps our bodies. In our home we don’t drink a lot of juices or soft drinks, it’s mainly water, tea, coffee and maybe some lemonade. I was wondering what types of compounds can be added to a fruit juice (orange, grape, whatever). This article is a nice place to get started on factors involved in ascorbic acid oxidation – thanks! Asking for a friend…. In other words, a molecule has to be present that will receive the electrons. Express your answer using two significant figures. We explain how it’s grown, made, preserved and packaged. Keep in mind that ascorbic acid can react into DHA very easily, so that it’s barely a rate limiting step. Which makes me now have serious questions about the bottle of liquid vitamin C I have…. If you’re interested in the science: This ring is actually very important for the activity and properties of vitamin C. Such a ring is common in a lot of other special food molecules and is especially good at holding onto electrons. You could certainly test out these metals as well. Thanks for your question! One of which is the Maillard reaction. You think if I buffered it that way, most of the c would be useful still? The chemical formula for carbon dioxide is A. C2O. This is also the case for vitamin C oxidation, as has been investigated by researchers in strawberry juice. I just thought the acid soak would help break them down better for absorption. It gets lost quite easily, by leaving your glass of orange juice out for too long but especially during processing of food. Lycopene is a naturally occuring red carotenoid pigment that is responsible in red to pink colors seen in tomatoes, pink grapefruit, and other foods. Why are they acidic? Trips to the East, essential for European traders to get those beloved spices, fabrics and other trading goods, used to take months. Orange juice is mostly water with probably hundreds of additional compounds. I use lemon juice for the citric acid so there’s definitely a reaction. The heated milk/OJ sample had more ascorbic acid than the unheated. I used juice squeezed that day and compared the concentrations of raw samples to those cooked for 5-30 minutes. Orange juice is mixtyre; baking soda sugar are compounds. Pharm, Ankara 38 (3) 233-255, link ; to learn more about the role of vitamin C in the body, Henry, C.J.K., Chapman, C. The nutrition handbook for food processors, 2002, chapter 10, link, Richardson, T., Finley, J.W., Chemical changes in food processing, 1985, Springer Science, link, Roth, K., and Streller , S., Vitamin C Deficiency – Part 3, 4-March 2014, Chemie in Unserer Zeit/Wiley-VCH, DOI: 10.1002/chemv.201400009, Wikipedia, Chemistry of ascorbic acid, link. Above you see: And remember, if you don’t find the answer here, you’re welcome to ask us any food-related question. It is important to know that this reaction is reversible. Ongoing research programs are examining the effects of limonin in human diseases. Nitric oxide, a gas naturally produced by the body, may help prevent ED. Click to share on Twitter (Opens in new window), Click to share on Pocket (Opens in new window), Click to share on Pinterest (Opens in new window), Click to email this to a friend (Opens in new window), Click to share on WhatsApp (Opens in new window), An Introduction to Acid/Base Reactions in Food, How baking powder & baking soda work – Chemistry of leavening agents, Βιταμίνη C και κρύωμα – Ody's fitness journey spot, https://foodcrumbles.com/vitamin-c-orange-juice/, Why and When You Should Use Orange Zest Instead of Juice, Spoilage of orange juice – a lesson in microbiology, How spirits are made – Visiting the Koval distillery. Did the unheated milk + OJ sample also have more ascorbic acid than the unheated OJ? Hello, thanks for the article it is really well explained. You can buy both in most supermarkets. Ascorbic acid is vitamin C, it’s just the chemical name. It is known that light influences the rate of vitamin C oxidation, as is the case for olive oil oxidation. All acids are hydrogen donors. – Remember that the oxidation of vitamin C to DHAA (dehydroascorbic acid) is a reversible reaction. Two, you can mix equal parts of gasoline and diet cola. To make matters more complicated: our bodies can’t make our own vitamin C and, vitamin C is pretty unstable. You’ve likely heard of the disease before: scurvy. That’s a fun question, appreciate you being concerned for your friend ;-). How fast this happens in your case, that’s hard to tell, but since vitamin C in a glass of orange juice can break down quite quickly, the same would happen for yours. I’m not really a chemist, but I’ve just done some vitamin C titrations for a school project and now I’m researching for my writeup. It has a chemical formula of C 6 H 12 O 2, which means it is always made of groups of 6 carbon atoms, 12 hydrogen atoms, and 2 oxygen atoms. In the case of ascorbic acid, metal ions can catalyse the reaction. I have been working on a bigger update of this post to better reflect your answer, but also several of the reaction mechanisms. Tropicana has nothing on me! Depending on the type of orange juice, it may be a mixture of many different things such as water (H20), glucose (C6H12O6), citric acid (C6H8O7) and trace amounts of minerals. Notify me of follow-up comments by email. 4 MFCD00011657 [MDL number] Natrium-4-[(E)-(2-h ydroxy-1-naphthyl)d iazenyl]benzolsulfo nat [German] [ACD/IUPAC Name] During ascorbic titration there is addition of oxalate ammonium. Three, you can dissolve crumbled cat litter in gasoline until the mixture is thick. 3. Hope that helps! An acid is a chemical compound with a pH less than 7. For a lot of reactions, the pH influences the reaction speed. In short, you don’t necessarily have to prevent the oxidation into dehydroascorbic acid as long as that doesn’t break down. Did you store and treat the orange juice in all experiments in a similar way as not to loose any vitamin C while it’s standing or being exposed to light? The molecule that is formed because of the oxidation of ascorbate is dehydroascorbic acid. The chemical formula for carbon dioxide is B. CO2. Did you see more or less vitamin C in the orange juice? Well-written article, but I think that something should have been said about the amount of sugar in orange juice, as we are now aware that this BY FAR creates the most clinical problems that are otherwise avoidable. This can come in handy in a lot of different situations and plays a very important role in the human body. This makes it more likely for molecules to meet one another and thus react. Although lemon and orange have different flavours, the taste in both cases is due to the same chemical. Ascorbate is not a very stable ion and tends to give away its electrons under the right conditions. You can actually buy these ascorbate salts from various manufacturers. I have a school project and I’m trying to find an independent variable for the oxidation of ascorbic acid haha. Antioxidant: what about adding another antioxidant (maybe some vitamin E) to see how that impacts it. My samples were only 30ml, and the 30 minute conditions tended to boil dry and caramelise a little, but vitamin C concentration was still about 80% of raw after 30 minutes cooking! There might be other oxidizers, but cancelling out this important one will have a significant impact. During this type of a reaction electrons are transferred from one species to the other. If we leave out the in between step of ascorbate (which you will often see being done in textbooks) the overall equilibrium reaction will become: C6H8O6 (ascorbic acid) ↔ C6H6O6 (dehydroascorbic acid) + 2 e– + 2 H+. These reactions keep on going back and forth. Those are some interesting results indeed, would any of the following be possible? Ink isn't a chemical compound but a solution or you could say heterogeneous mixture of many components like dye...chemical solvent etc.. so it can't have a chemical formula just like Coca-Cola and orange juice. Which way it goes depends on the external conditions. This means that if you add ascorbic acid to water it will turn the water slightly sour, the pH-value will drop below 7. Am I getting that correctly? If you mix acids and bases (so components with a low and high pH) this is what you’ll get, it’s not harmful by itself. I have never tested it, but if you can easily get a hold of the strips it might be worthwhile testing (and returning the head if it doesn’t work!). Note again that the arrows point in two directions. Clearly the lemon juice was the winner here. The claims are it neutralises chlorine in the water. What form would I add it to the juice in so that it actually has some sort of effect on the Vitamin C content? You could test both for different concentrations as well as for the effect of time. The culprit: oxidation of the vitamin C. Luckily, once you understand how this happens, there are ways to prevent it. orange juice, 2.2×10−4M. Orange juice is a popular drink throughout the world. Orange juice is not a single compound with its own chemical formula. Syrup C. Water D. Milk . For them to react there will have to be enough water. Oxygen is known to be a very good oxidizer. (pH4 being the optimum pH for oxidation seems counter-intuitive though and I’ve read somewhere that neutral and basic conditions promote oxidation which is what you’d expect, so I’ll need to look into that further.). If your drink contains reducing agents, these might be oxidized before the vitamin C gets oxidized. Linoleic acid has a chemical formula of CH3(CH2)4CH=CHCH2CH=CH(CH2)7CO2H, which is an unsaturated fatty acid that has a melting point of -5ºC. And still, scurvy isn’t completely gone from the world, only showing just how important getting enough vitamin C is for our bodies. Hope that helps! Besides the Maillard reaction there are a lot of different ways dehydroascorbic acid can react further. That would help determine whether the hypothesis above is correct. What is the role of this compound ? ... Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid. Ascorbic acid: it may sound obvious, but you can buy powdered ascorbic acid. Researchers have proposed removal of limonoids from orange juice and other products (known as "debittering") through the use of polymeric films. D&C Orange No. 16 oz is around 3x more juice than is recommended for 1 portion to be classed as 1 of your 5-a-day. by Nick Meyer | July 20, 2020 . Citric Acid Molecule-- Space Fill Model To View the Citric Acid Molecule in 3D using Jsmol. I've been blessed with the juiciest sweetest oranges; 3 oranges yield 16 oz. Book on nutrition for food processors for more information on the degradation of vitamin C. A book on changes occuring during processing of foods. After de-aeration, as little air as possible will be left in the bottle. In the case of these shower heads the filters they supply may also play a role here. Orange juice is a liquid extract of the orange tree fruit, produced by squeezing or reaming oranges. An acid will give away a hydrogen to an alkaline compound called a base. As far as healthy drinks go, few are more popular in the United States than a glass of orange juice with breakfast. Therefore, it won’t oxidize anymore later, it’s already ‘done’. I must immediately admit, I’m not a vitamin C shower head expert, I had never heard of them before your question! It has been found that the reaction takes place fastest at a pH of 4 (The nutrition handbook for food processors). Light: does storing juice in darkness or bright sunlight have an impact? H2SO4(aq) and KOH(aq) Express your answer as a chemical equation. Also, the oxidation of vitamin C is reversible as we discussed above. If I look at it purely from a nutrition perspective: you have to take the vitamin C in, that is swallow it in, for it to enter your body and do its thing. Express your answer using two significant figures. Do think about whether you want to squeeze or blend…, Buettner, G.R., Schafer, F.Q, Ascorbate (vitamin C) and its antioxidant chemistry, link, Domitrovic, R., Vitamin C in disease prevention and therapy, 2006, Biochemia Medica 2006;16(2)89–228, link, HACIŞEVKĐ, Aysun, AN OVERVIEW OF ASCORBIC ACID BIOCHEMISTRY, 2009, J. Fac. That is, it can go in two directions. It inhibits the oxidation of other molecules that shouldn’t be oxidized. Vice versa if there are barely any. The acidity in lemon juice seems to really help preserve ascorbic acid, so be sure to take some with you on your next long sea voyage! As the name says, vitamin C is an acid. Both ascorbic acid and dehydroascorbic acid are involved in vital functions within the body. Instead, orange juice is a homogeneous mixture (except for the pulp) of potentially hundreds of compounds, each with its own chemical formula. Systematic Name: Oils, orange-juice CAS Number: 68514-75-0. These vesicles contain the juice of the orange and can be left in or removed during the manufacturing process. When left open to the air, which contains oxygen, ascorbic acid is prone to oxidation. If there is any practical advice resulting from this it’s that it’s best not to store orange juice in a copper pot. In the case of sodium that would be regular table salt (NaCl). Learn how your comment data is processed. Determine the concentration of hydronium ions in orange juice. An oxidation reaction is an example of a redox reaction. It contains mostly water (H2O), glucose (C6H12O6), and many minerals in trace amounts. Express your answer as a chemical formula. The excessive lemon juice causes some acid reflux sometimes tho if I don’t buffer it. Therefore, food scientists have investigated how to control the rate of the oxidation of vitamin C as well as the degradation of the dehydroascorbic acid. This could slow down the reaction. This is the most informative article I have found on the web about vitamin C oxidation. – Citric acid: C6H8O7 B Because its composition is not uniform throughout, orange juice is a heterogeneous mixture. Thanks for the suggestion! Having a chemical formula of C40H56, lycopene is a tetraterpene assembled from eight isoprene units that are solely composed of carbon and hydrogen. Hi! I would guess something like Calcium or Sodium. Would that agree with what you’re finding? It seems like you’re looking for variables to test for their impact on vitamin C content, a few thoughts you could test for to learn more about vitamin C and its stability: Hope some of these are helpful to do your project! They wouldn’t necessarily run out of sufficient calories, they did run out of those oh so important fruits and vegetables. The chemical formula of vitamin C is C6H8O6. As well as variations in oranges used, some varieties include differing amounts of juice vesicles, known as "pulp" in American English, and "(juicy) bits" in British English. When reading about vitamin C, you might come across the name ascorbic acid. Orange and lemon peel both contain a molecule called limonene. Hope that’s clear! The copper ions will speed up the reaction greatly. Based on our research it’s DHA that reacts in the Maillard reaction, however, these are highly complex reaction mechanisms that aren’t yet fully understood with new knowledge still be discovered. This means that if you add ascorbic acid to water it will turn the water slightly sour, the pH-value will drop below 7. Log in for more information. Couple minutes tops. And if I keep a constant amount of metal ions added, will leaving the juice out for longer still affect the oxidation? Also, if I add a certain amount of an oxidizing agent, will letting it sit for longer periods of time have an effect (the same amount added each time)? Yes, you can increase the vitamin C concentration again by adding some back, as a matter of fact, it is what juice manufacturers do in their production process. Much of the flavor comes from citric acid (C6H8O7). Overall we can say that: vitamin C has the ability to reduce other molecules (and thus be oxidized itself). I investigated vitamin C degradation in lemon juice cooked for various lengths of time. As soon as you dissolve them in water reactions will indeed occur and can likely lead to loss of vitamin C. Hope that helps! What were your observations when you did your titration experiment? Only a few centuries ago, European (and likely many others) seamen died by the dozens during months long sea voyages to the East. C6H7O6– (ascorbate) ↔ C6H7O6 (dehydroascorbic acid) + 2 e– + H+, Shouldnt it be: Some substances in orange juice: Protein (g) 0.70 Reason for a lot of these deaths therefore wasn’t a lack of carbohydrates, proteins, etc. There are some pretty bad choices out there that only contain 10% juice and the rest is just water and various forms of fructose (most likely from GMOs if not organic) and other chemical additives.

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