Please tell me about the testing and analyst of Chloramphenical in specific. I need it urgently. Thanks a lot!
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DescriptionReturn to top \nChloramphenicol (klor-am-FEN-i-kole) belongs to the family of medicines called antibiotics. Chloramphenicol otic drops are used to treat infections of the ear canal. This medicine may be used alone or with other medicines that are taken by mouth for ear canal infections.\n\nChloramphenicol is available only with your doctor's prescription, in the following dosage form:
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http://en.wikipedia.org/wiki/Cyanuric_acid
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I honestly don't know. I always wanted to find out though. Is there a valid test available that doesn't charge for the results? It would be an interesting thing to see.
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Well, I'm not active in the field, but have found some link for you...\n\nHopefully you will get some of the information you are looking for - otherwise do not hesitate to contact the Zurich university (second link).
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http://rds.yahoo.com/_ylt=A0geusSOOEpF8VAAPK5XNyoA;_ylu=X3oDMTE3aDN1bnBuBGNvbG8DZQRsA1dTMQRwb3MDMwRzZWMDc3IEdnRpZANCMTAxXzExNg--/SIG=12v1f9lu0/EXP=1162578446/**http%3a//www.firstlab.com/Newsletters/NewsletterDocs/FLRGeorgiaPowerStudy.doc\n\nI went back and read the study after posting the link, and as a sociologist I notice that the study was severly flawed. The most obvious flaw being that the "control group" was a hand selected group of high performing individuals who had never even been tested for drug use. They may all have been speedballers for all we know. If you notice in the study- the number given for the "control group" are way way off of the company avarage. The below link is a rebuttal. I tend to agree with it more, but still, take neither as fact.
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http://www.chemexinter.com/ for the website.\n\nHope that helps!
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http://abstracts.aspb.org/pb2004/public/P28/7904.html\n\nhttp://www.nio.org/jsp/analytical.jsp
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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.
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I don't really know... but this site has all sorts of testing kits available. I figured I would just show you the link... you will know what you are reading... i don't!!\n\ngood luck.\n\nhttp://www.focusdx.com/focus/2-diagnostic_products/product_list.asp?region=dom
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What class was this in? What grade level? What text were you using?  I may be able to help you if I know the context in which the question was raised. I have a feeling that I am not getting all the information you had. Please tell me and maybe I can help. I am an old chemist and microbiologist.
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Dont panic! Make sure he abstains at least 48 hrs from taking any toxins. Go to your nearest Smoke/Head or vitamin center at mall maybe, ask for a detox drink for cleansing toxins for extremly toxic persons. Lets be candid, we know what were talking about but these are the correct things to ask for. Anyway, there are several kinds but basically you just drink this stuff (it tastes terrible but who cares ) about 1-2 hrs before urine test. Drink 32 oz water. take a good whizz or two then Get er done. It is not that hard to do . Dont be worried. Most drug tests are screens. This should do the trick. I have used this for several drug tests with different employers & passed all tests. None of these hypocrites who piously answered you can show a newspaper article anywhere that pot makes people do anything bad. But there is alot of news about alcohol, and how about all the psych. meds people are on working around us everyday. What a crock of shit. Ok Best of luck to you folks! Later!
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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)?
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Grignard Synthesis of Benzoic Acid\n\n\nPreparation:  McMurry, sections 10.8 and 20.6.\n\nConversion of an organic halide into a Grignard reagent completely transforms the reactive character of the organic compound. Carbon bears partial positive charge when bonded to halogen but partial negative charge when the carbon is bonded to magnesium. The Grignard reagent is a very reactive nucleophile and base. \n\nIn this experiment you will make the Grignard reagent phenyl magnesium bromide; this reagent will then be treated with carbon dioxide to form benzoic acid. The sequence (Equation I) is explained in McMurry Sect 20.6.\n\n\nAs in any work, this experiment may not succeed the first time; be prepared to repeat it from the beginning. On the second try, you should be able to work much more efficiently and with more understanding. \n\n\nProcedure: Obtain a 150 mm piece of magnesium ribbon. Hold one end with forceps and with the other hand remove the residue on the ribbon by scraping it with a spatula, scissors or pliers to obtain a shiny surface. Cut at least 0.12 g of the shiny ribbon into 2-3 mm pieces (do not handle the pieces) and place on a folded piece of paper to obtain the mass on the balance. Transfer the magnesium pieces to the 5 mL conical vial, add the dry spin vane, add one small crystal of iodine and add 300 µL (0.3 mL) of anhydrous ether. Be prepared to add more ether as necessary to maintain the liquid level at a minimum of 300 µL.\n\nAssemble the rest of the apparatus as in Mayo, et al., Fig 3.24. Clamp the apparatus firmly to a stand.\n\nIn the hood, prepare a solution of 510 µL of bromobenzene in 700 µL of anhydrous ether in the 3 mL vial using the delivery pipettes provided. Cap this vial with a polyethylene top. \n\n(*Note:  Be certain the dry ice is ready before you initiate the reaction below.)\n\nDraw half of the bromobenzene solution into the syringe and insert the needle through the polyethylene cap in the Claisen head as in the figure. While stirring the mixture below, add 6-8 drops of the bromobenzene solution. Evidence of reaction is the formation of tiny bubbles. When the reaction has started, add the remainder of the bromobenzene solution slowly over 3-5 min. The temperature should be maintained at about 40 oC to allow gentle refluxing (Mayo, et al., p. 29) of the ether. To the 3 mL vial add an extra 300 µL of ether, then transfer this to the reaction via the syringe. Adjust the total volume to 3 mL with the addition of more anhydrous ether. Reflux the mixture for 10 minutes, then allow the gray-brown solution of the Grignard reagent to cool to room temperature. What do you observe?\n\nThe Dry Ice (at least 1.0 g) is added in small chunks to the Grignard solution. Note the reaction as this is added. To convert the C6H5C(=O)-OMgBr, to benzoic acid (last step, Equation I), use a pipet to VERY SLOWLY add 1 mL of 6 N HCl and again observe the result. Test the aqueous layer with pH paper; it should be acidic. Remove the ether by gently heating the vial for 5 minutes on the steam bath. Cap the vial, mark it and set it in your drawer until the next laboratory period. \n\nPreparation for the 2nd laboratory period:  The benzoic acid has been synthesized, but it must be purified. Water soluble magnesium salts are removed by extracting away the water layer; but, a number of organic side products remain with the benzoic acid.  These are side products of the Grignard reaction; small amounts of benzene are formed (Equation II), unreacted bromobenzene remains, and biphenyl, H5C6-C6H5, is formed from the reaction (Equation III). \n\nThe benzoic acid can be isolated from this mixture by taking advantage of its property as an acid. Only it can dissolve in aqueous NaOH (Equation IV) while the side products remain in the ether. After the ether-soluble side products have been removed, strong acid is again added to reverse this reaction in order to restore the benzoic acid.\n\nRecrystallization of the crude product in
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Try looking up the pH of the various substances.  Your school librarian should be able to help you with more specifics on searching, particularly as several good print resources exist on this topic (and print resources are MUCH better than "googling" because they've typically been checked for accuracy wheras most web content has not).  I've included a couple sites to get you started, but you should find nonweb resources to verify the information.  \n\nIt is interesting to note in a project like the one you're doing that the digestive system works by corrosive action of strong acid (primarily concentrated hydrochloric acid), so almost anything you consume is going to be higher in pH than your digestive system.  Also, corrosivity is only one measure of chemical action (and danger)!  \n\nHave fun and good luck with your project.
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yes ... I have a bottle of spring water in front of me with the "typical analysis" listing (milligrams per liter): sodium 4.8, potassium 0.75, calcium 0.65 iron 0.04, magnesium 1.2, chlorine 9.5 -- quite low levels of salts (these ions would make chloride salts of various types) and certainly no taste.
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First take 30ml of 1% starch solution and add 6 ml of concentrated HCL acid and distribute them into six test tubes labeled as 'A' TO 'F'. Place them in boiling water bath and take them out at various time intervals like 0', 1', 5', 10', 13' and 15' minutes respectively.\n\nDivide the tubes content into three tubes and do iodine, Fehlings and Benedicts tests in the fractions.\n\nyou can do osazone test in the 15' minute fraction for the conformation of the presence of glucose.\n\nCompare the color developed in different tubes.  It clearly shows difference
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I got your message.  I a little unsure about what you need to know.  I thought you said that you bought this chemical before.  What did you use it for and/or what do you need it for?  If you want more info. on the chemical itself go to your search bar and type in "strychnine hcl powder" and the listed sites will give you all the information that you need.