I am doing a project for chem and had significantly higher results of vitamin c than expected when titrating orange juice with iodine. Are there any good sources of error?
133772
When I was growing up we used DCPIP (Di-Chloro-Phenol-Indo-Phenol) to test for Vit C.\n\nWhere did you get the OJ from? Some have added vitamins...\nHow freshly prepared was the Iodine tincture?\nDid you do your own dilutions of titrant?\nCould the Iodine have reacted with a carbohydrate present in the OJ (like it does with starch)?
6847
http://www.thorne.com/altmedrev/fulltext/glut.html\n\nThis is the primary place which you should read about Glutathione :)  Is it safe?  Within moderation, yes, however like all antioxidents you don't want to over do it :)
486693
I am a huge fan of Turmeric as well and have never hear of any ill effect or seen any writings on it - unlike excessive carrot consumption which can cause you to turn orange-there is not even an anecdotal side effect I have ever come across.
357648
This sounds like a lab question and we don't have the details. Possible differences are lab versus standard conditions, quality of equipment, and impure reagents.
444492
There is a lot of sugar in orange juice, some add high fructose corn syrup. If you drink too much you will gain weight.  You should drink water, tons of water.  a small four oz glass of OJ is ok, but more than that, it is like drinking soft drinks.  If you squeeze your own OJ, it is a good way to know what is in it.  Read the labels!! it is cheaper to add corn syrup than oranges!!!
101869
Milk has vitamin D & A, o.j. and apple juice has vitamin C.
388112
You wont see any better, its a fallacy promoted during WW2 to cover up the fact that the English and invented RADAR!  Mind you drink too much and you may well go orange, all that beta carotine is not good for you...;
247694
The juice of the red cabbage is a natural indicator, with the transition from purplish to red/pink.  Don't recall at what pH, off the top of my head.
652967
i'm not sure but it's by Vitamin C
291349
carwash's ideas are pretty good, particularly TLC and spectroscopy.\n\nI don't think I'd do a titration against a base, because esters will also react with bases (hydrolysis). For a synthesis, this doesn't matter. But for an analytical method, it invalidates the technique, unless you can account for it with a standard or something. You might end up getting a result higher than what it should be because of it. (It depends on the chemical environment of the ester)
346548
I'm not the best at chemistry, in fact, I was crap at it.. but I'll give it a go...\n\nA) Can A\n\nB) The Zinc will react to the juice, giving it a bad taste and make it dodgy.\n\nC) Copper is good for containing liquids, this is why the water supply system and pipes are made of Copper... instead of Lead, of course!\n\nD) Probably not, Zinc doesn't go down too well with juice (I think) and it may have reacted badly.\n\nIs that any good? What I know about chemistry can be written on the back of a postage stamp!
442211
o.j.  It's full of vit. c
637277
The Thyroid Foundation says not to, as does Mary Shoman (an expert in the field):\n\n"Is goitre due to lack of iodine in our diet? Should I eat kelp to get rid of this goitre?\n\nANSWER:\nIodine deficiency is the most common cause of goitre in the world but NOT in this country. We have had iodized salt for two generations, and there are many other sources of iodine now in our diets so that, if anything, we are receiving more iodine than in most places in the world. There is no point whatsoever in adding more iodine to the diet and that includes kelp, a form of seaweed high in iodine often sold in health food stores. The problem is that too much iodine is just as dangerous as too little iodine. Excess iodine can also cause goitres and can either cause a low thyroid state, (hypothyroidism) or excess output of thyroid (hyperthyroidism). It also aggravates Hashimoto's thyroiditis. In Canada it is a mistake to ingest kelp."\n\nMary Shoman said:\n\n"While some herbalists and vitamin proponents recommend iodine tablets or kelp supplements (which are high in iodine) for people with thyroid problems, you need to be extremely careful about any decision to take iodine or kelp supplements if you are on thyroid hormone replacement therapy."\n\nRead more: http://thyroid.about.com/cs/drugdatabase/f/kelp.htm\n\nHope that helps!
448049
Yes, it is true that the density of a solution is different of solvant but tjis difference is small ; So , i propose to dissove 40g of amyl acetate in a liter of water if that acetate is a solid. If that acetate is aliquid the total volume will be 1.04 l and you must use 47 cc tp water
156897
Not enough of vit C. vit. C has acids the help cuts heal like oranges
634718
are you taking your iron with orange juice will help breakdown the iron to make you body use it more efficiently.  Do not use grapefruit juice it does not work.  \n\nread the following for other information
298351
The free Vitamin C with Rosehips was an eye catcher. The tea selections and prices were excellent. I would have like to see\nhealth information links to possible uses of the vitamins. Shipping prices are too high for me and I will not order anything today even though the prices are excellent.