How to increase the selectivity of Edta?
540679
Selectivity for what?  EDTA is used in several different systems.
708668
Que Paso Gringo,\n\nWith all due respect to the other participants answering this question, WHAT THE HELL IS SO GOOD AND EFFECTIVE ABOUT SCIENTIFICALY PROVEN CHEMO AND RADIATION?\n\nIm a natural health practitioner and people who state that EDTA CHELATION its not PROVEN or not SCIENTIFICALY APPROVED are obviously ignorant and have never had the insidious deisease nor have any of their friends or relatives, and God forbid they do, cause those SCIENTIFICALY PROVEN alopathic methods surely will cause an extreme amount of damage besides burning all cells, good and bad, in the system.\n\nI have used EDTA successfuly for Diabetics and Cancer patients along with a proper PH balance and stress control, all contributing factors to any disease.\n\nNone other than a true American Hero such as Dr. Linus Pauling have endorsed EDTA CHELATION for effective non invasive cancer treatments. Linus Pauling, PhD is the only person ever to have received 2 FULL, UNSHARED Nobel Prizes. He was one of the world's greatest biochemists and scientists. Before his death he wrote and researched extensively in the field of alternative and nutritional medicine.\n\nFor more than twenty years Dr. Pauling devoted most of his time to research and educate in the fields of nutrition and preventive medicine. He wrote and lectured extensively about simple, safe and inexpensive measures to improve the length and quality of life. In his recent books, How to Live Longer and Feel Better, he covered that subject at length. \n\nDr. Pauling stated that EDTA chelation therapy fits in well with his views on health care. SO IF THE ESTEEMED FELLOWS ANSWERING THIS QUESTION CAN CALL DR. PAULING A QUACK then it confirms their motives for writing such a ridiculous statement for all the world to see. \n\nAmigo, EDTA is not normally present in the human body and is therefore, by definition, not an Orthomolecular substance. Chelation, however, is far safer and much less expensive than surgical treatments for atherosclerosis. Physicians who adhere to the protocol for safe and effective administration of EDTA, as approved and promulgated by the American College of Advancement in Medicine, integrate the results of the proven research into their chelation program. \n\nThat protocol is published in its entirety fro any medical prefsional or potential patient to review. Improved nutrition and supplementation with vitamins and trace elements is an important part of the overall chelation program. \n\nEDTA chelation therapy makes good sense, It has a rational scientific basis, and the evidence for clinical benefit seems to be quite strong. Metallic ions play an important role in the formation of atherosclerotic plaque. EDTA removes those ions with relative safety and without surgery. Published research and extensive clinical experience show that EDTA helps to reduce and prevent atherosclerotic plaques, thus improving blood flow to the heart and other organs. The scientific evidence indicates that a course of EDTA chelation therapy might eliminate the need for bypass surgery. Chelation has an equally valid rationale for use as a preventive treatment. \n\nFurthermore, yet ANOTHER Nobel Prize winner, and yes this Doctor also won 2 Nobel Prizes, one in 1931 and the other in 1938, Dr. Otto Werberg of Germany, who discovered that cancer is formed when the cells and tissues are "anaerobic", with out sufficent oxygen. EDTA chelation accelerates de detox process removing the excess acid in the body, thereby raising the Alkaline level or oxigen level for all functions of the body and once this is achieved, no way that any tumor, harmful bacteria, germs, parasites or fungus can stay alive in the body, it all now gets naturaly excreted by the waste system.\n\nTherefore, the decision should be obvious, use an alternative treatment that is LEGAL and EFFECTIVE, that costs considerably less than traditional alopathic methods and DOES not cause any secondary damage to the body.\n\nAt your service
485893
Check on the internet for the ratios used by comercial factories, then prepare a solution from glycol and water in the given proportion. That's all!!!
963455
Copper C-145000\n\nCopper  Includes Ag + Te  \nPhosphorus  Other deoxidizers may be used  \nTellurium  0.4 - 0.7
1135506
Dilute the stock solution.\n\nBe careful, though. Trifluoroacetic is very noxious stuff. My undergrad organic teacher said that he handled inorganic acids for years, with no problem. First day he handled trifluoroacetic, he burned himself.
691237
ethylenediaminetetraacetic acid\n\nIt has lots of commercial uses and is used in making all kinds of things such as beer, canned food, and shampoo. In fact more than 100,000 metric tons are created every year.
731517
Use the limiting reactant.
800634
Try using Orajel or Anbesol,it helps.
883304
Na2EDTA is a complex molecule. Its name stands for ethylenediaminetetraacetic acid – disodium salt. The formula is Na2C10H14N2O8. Even though its name and structure are complex, you only need to know that: EDTA reacts with Ca+2 and Mg+2 in a one to one ratio as follows:\n:Ca+2 + EDTA-2 -----> CaEDTA\n\nMg+2 + EDTA-2 -----> MgEDTA\nThe formula mass of Na2EDTA dihydrate is 372.24 g/mole.Na2EDTA comes as a dihydrate(absorbs water from the atmosphere) which is efflorescent (literally means "bursting into flower" but in this case just means that it forms bubbles), you cannot reliably weigh out the desired number of grams. The salt may be fully, or only partially, hydrated at the time you weigh it. The result is that you cannot be certain that you have prepared the proper strength reagent of EDTA..therefore: you need to standardize the solution  The results of the titration is reported as mg of CaCO3/liter.\nTo convert Calcium plus Magnesium (meq/L) Hardness as CaCO3 (mg/L) 50\nOf course since Fe and Mg and Ca and other metals are also present in water it is better (more accurate) to titrate for each metal species individually and calculate the hardness using the results of the individual results. EDTA hardness is sometimes referred to as "Total hardness"and is reported as " Hardness as mg/l CaCO3."
106494
First, distill off the alcohol. With ethanol, the best you can get is 95% purity, the remaining 5% is water. There are cheap zeolites and hygroscopic salts such as CaCl2 or NaOH available which can further reduce the amount of water. If you are still not happy, you can get absolute alcohols by using magnesium. And magnesium ribbons or turnings are relatively cheap, too. Place (50-100 g) magnesium in a flask, put some amount of alcohol just to cover the magnesium. Leave for a few hours until you see white magnesium alkoxide being formed on the surface of the metal. Caution: exothermic reaction. Use the tallest distillation column you can find. Do not stir the mixture. Just leave it there. When you have now a lot of magnesium alkoxide you can add more alcohol (up to 2 liters). The alkoxide will destroy any water in the alcohol and you now can distill off your absolute alcohols. For methanol and ethanol, formation of the alkoxide takes only a few hours. For other alcohols, you might need to activate the magnesium by adding some solid iodine and heating to activate the magnesium. Don't distill to dryness. The remaining alkoxide reacts violently with water. Use alcohol-water mixture when disposing them. Sounds fun, doesn't it? =)
860724
The link below gives a method and chromatogram.  Bear in mind that you will need to prevent the degradation of ascorbic acid during the analysis.  This may be done by adding EDTA and HCl to the solutions, but you will have to work out the concentrations.
174475
mix it...let NaCl dissolve in water...then let the mmixture evaporate or perhaps bring the mixture into a boil 'til you can see the formation of crystals...   try it... i've encountered such experiment in my chemistry class... im not quite certain of the procedures though...it's two years ago...cant remember it well...^_^
125296
use spectrophotometric method(uv-vis spectrometry).Few things u shud remember.....\n1) Use Labert-Beer's law\n2) u shud know the molar extingtion coefficient value of that particular species\n3) concentration of the species\n4) Calculate lambdamax. using LB law\nIt is an indirect method.\n\nUV-VIS. Spectroscopy will give u the lambdamax value directly...alongwith absorbance
439611
Yes!\n\nComparison of the Ammonium Oxalate Extraction of Fertilizer for K2O, Method 983.02, with the Ammonium Citrate/EDTA Extraction, Method 993.31 \nNatalie F. Newlon \n\nThe direct available method for phosphorus in fertilizers, Method 960.03, is an Official Method for extraction of both P2O5 and K2O. Because K2O is much more soluble and easier to extract than P2O5, the conditions of the extraction procedure are set for efficient extraction of P2O5, and the extraction of K2O is, in effect, a bonus. In 1993, a modified extraction procedure, using an extractant of ammonium citrate/ethylenediaminetetraacetic acid (EDTA) solution, was evaluated for P2O5 and then collaboratively studied. This now-modified extraction procedure for phosphorus is Official Method 993.31, which is used extensively as an alternative to Method 960.03 for phosphorus because it is less labor-intensive. Method 993.31 was also evaluated in our laboratory for K2O extraction, but it was never formally collaboratively studied for K2O. To demonstrate the suitability of Method 993.31 as an extraction procedure for K2O, as well as P2O5 in fertilizers, Method 993.31 extraction for K2O was compared with Method 983.02, the traditional ammonium oxalate extraction procedure for K2O. A wide range of fertilizer samples was extracted by using both procedures. The t-test for samples containing <30% K2O had a t-value of 1.23 and a probability of 0.22, which indicates there was no significant difference in the results obtained by the 2 extraction methods. The t-test for samples containing >30% K2O had a t-value of 0.30 and a probability of 0.77, also indicating no significant difference. It is recommended that Method 983.02 be modified to include the ammonium citrate/EDTA extraction procedure as an additional option for extraction of K2O from commercial fertilizers.
298794
Add magnesium oxide to a citric acid solution perhaps
742913
Gel Electrophoresis is a biggie\nYou can take advantage of their isoelectric points\nYou can take advantage of their acid/base chemistry \nYou can selectiviely stain them (ninhydrin comes to mind)
98966
I think you can find everythin u are lookin for and more on this site.. good luck!!!http://www.tannerm.com/electrochem.htm