Possible Error In Chromatography
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Sources Of Error In Paper Chromatography Lab
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Paper Chromatography Error Analysis
as you navigate and presentPeople invited to a presentation do not need a Prezi accountThis link expires 10 minutes after you close the presentationA maximum of 30 users can limitations in chromatography follow your presentationLearn more about this feature in our knowledge base article Do you really want to delete this prezi? Neither you, nor the coeditors you shared it with will be able to recover it again. DeleteCancelMake your likes visible on Facebook? Connect your Facebook account to Prezi and let your likes appear on your timeline. You can change sources of error in tlc chromatography this under Settings & Account at any time. No, thanksConnect with FacebookPaper Chromatography Lab No description by on 22 September 2014 TweetComments (0) Please log in to add your comment. Report abuseTranscript of Paper Chromatography Lab DataPaper Chromatography Lab By: Priyanka Das, Riju Patra and Tiffany TangPurposeTo use paper chromatography to separate a mixture of metallic ions in solution, thus using the position and color of the spot produced by each ion to determine the ions present in the unknowns. ProceduresIn this lab, samples of 5 different cations are placed on chromatography paper, along with a known mixture, which is a mixture of the 5 cations, and 4 unknown substances. The paper was then placed in eluting solution, which is a mixture of HCL, ethanol, and butanol, and then dried and stained with potassium iodide and potassium ferrocyanide.ConclusionMSDSPropagative ErrorPropagative error is present in the Rf values, as incorrect distances measured led to incorrect calculations. The lack of reliability reduces the accuracy of the results. This also influences final average calculated for the Rf value of a
chromatographic analysis. Effect of sampling parameters on the accuracy of numerical measurementsAuthorsAuthors and affiliationsM. GoedertG. GuiochonOriginalsReceived: 29 September 1972Accepted: 06 October 1972DOI: 10.1007/BF02270542Cite this article as: Goedert, M. & Guiochon, G. Chromatographia (1973) 6: http://link.springer.com/article/10.1007/BF02270542 76. doi:10.1007/BF02270542SummaryIt is not possible in practice to carry out measurements in quantitative or qualitative analysis at a precision level better than 0.5% if conventional equipment such as recorders and electronic integrators are used to obtain the data. Only numerical techniques of on-line or off-line measurements associated with data handling by computer can be used. From their very nature numerical techniques are discontinuous and error in the number of experimental points is limited. According to information theory this discontinuous character does not imply a loss of accuracy provided that some simple relationship derived from the theory of sampled systems is fulfilled. These conditions deal with the choice of the sampling frequency, the frequency band-width of the amplifier and measurement system, and the upper limit of the signal frequency. We have sources of error made a theoretical and an experimental study of these phenomena and the results allow us to derive some simple rules which make the choice of parameters of the system of data acquisition easy. We have also determined the main sources of error in data acquisition systems and calculated their contribution.Literature[1] Guiochon, G., Goedert, M., Jacob, L., Gas Chromatography 1970, R. Stock, ed., The Institute of Petroleum, London, 1971, p. 160.Google Scholar[2] Goedert, M., Guiochon, G., J. Chromatog. Sci.,7, 323 (1969).Google Scholar[3] Goedert, M., Guiochon, G., Anal. Chem.,42, 966 (1970).Google Scholar[4] Goedert, M., Guiochon, G., Chimie Analytique,53, 214 (1971).Google Scholar[5] Oberholtzer, J. E., Rogers, L. B., Anal. Chem.41, 1234 (1969).Google Scholar[6] Culp, R. A., Lochmuller, C. H., Moreland, A. K. Swingle, R. S., Rogers, L. B., J. Chromatog. Sci.9, 6 (1971).Google Scholar[7] Ragazzini, J. R., Franklin, G. F., Les Systèmes asservis échantillonnés, Dunod, Paris, (1962).Google Scholar[8] Stern, J., de Barberac, J., Poggi, R., Méthodes pratiques d'étude des fonctions aléatoires, Dunod, Paris (1967), p. 219.Google Scholar[9] McWilliam, G., Bolton, H. C. Anal. Chem.,41, 1755 (1969).CrossRefGoogle Scholar[10] Bassière, M., Gaignebet, E., Métrologie Générale, Dunod, Paris (1966), p. 160.Google Scholar[11] Schmauch, L. J., Anal. Chem.,31,