High performance thin layer chromatography

8,179 views

Published on

Published in: Education, Technology

High performance thin layer chromatography

  1. 1. HPTLC ( High performance thin layer chromatography) VAISHNAVI U.S.D.N M.Pharmacy(Pharmaceutical Chemistry) 170213884006 UNDER THE GUIDENCE: CEEMA MATHEW,M.pharmacy Asst.Professor
  2. 2. INDEX INTRODUCTION  ADVANTAGES OF HPTLC OVER HPLC & TLC  FEATURES OF HPTLC  STEPS INVOLVED IN HPTLC  DIFFERENCES BETWEEN TLC AND HPTLC  2
  3. 3. INTRODUCTION 3
  4. 4. CHROMATOGRAPHY is a broad range of physical methods used to separate and or to analyze complex mixtures. The components to be separated are distributed between two phases: a s ta tio na ry p ha s e bed and a m o bile p ha s e which percolates through the stationary bed.   4
  5. 5. High performance thin layer chromatography (HPTLC) is an enhanced form of thin layer chromatography (TLC). A number of enhancements can be made to the basic method of thin layer chromatography to automate the different steps, to increase the resolution achieved and to 5allow
  6. 6.  n Pri Automation is useful to overcome the uncertainty in droplet size and position when the sample is applied to the TLC plate by hand. le cip of n ti o ra pa se AD is S N IO T RP O 6
  7. 7. Advantages of HPTLC over HPLC Sample and standard, both can be used at a time.  Evaluation time is less.  Use of internal standard is not necessary.  Simultaneously 2 or 3 persons can work but not in case of HPLC.  Solvent degasing and removal of 7 
  8. 8. Advantages of HPTLC over TLC Visual chromatogram  simplicity  Multiple sample handling  Low running and maintenance costs and disposable layer etc  Detection by TLC scanner  Spotting by applicator  Highly precised  8
  9. 9. FEATURES OF HPTLC 9
  10. 10.          Simultaneous processing of sample and standard - better analytical precision and accuracy less need for Internal Standard Several analysts work simultaneously Lower analysis time and less cost per analysis Low maintenance cost Simple sample preparation - handle samples of divergent nature No prior treatment for solvents like filtration and degassing Low mobile phase consumption per sample No interference from previous analysis - fresh stationary and mobile phases for each analysis no contamination 10 Visual detection possible - open system
  11. 11. STEPS INVOLVED IN HPTLC 11
  12. 12. 12
  13. 13. Selection of chromatographic layer · Precoated plates - different support materials - different Sorbents available · 80% of analysis - silica gel GF · Basic substances, alkaloids and steroids Aluminum oxide · Amino acids, dipeptides, sugars and alkaloids - cellulose . Non-polar substances, fatty acids, carotenoids, cholesterol - RP2, RP8 and 13 RP18
  14. 14. Sample and Standard Preparation To avoid interference from impurities and watervapours Solvents used are Methanol, Chloroform: Methanol (1:1) Ethyl acetate: Methanol (1:1) Chloroform: Methanol: Ammonia (90:10:1) Methylene chloride : Methanol (1:1) 1% Ammonia or 1% Acetic acid 14
  15. 15. Layer pre-washing & pre-conditioning   If any impurities are present, those are need to be removed hence pre washing is done. Conc.HCl : Methanol(1:9) Plate is dipped in the soln, allowed for the solvent to pass throughout the plate. Hence impurities are washed out 15
  16. 16. Activation of pre-coated plates Freshly open box of plates do not require activation Plates exposed to high humidity or kept on hand for long time to be activated By placing in an oven at 110-120ºc for 30’ prior to spotting (pre conditioning) Aluminum sheets should be kept in 16 between two glass plates and
  17. 17. Application of sample and standard · Usual concentration range is 0.1-1µg / µl · Above this causes poor separation · Linomat IV (automatic applicator) nitrogen gas sprays sample and standard from syringe on TLC plates as bands 17
  18. 18. Selection of Mobile phase Can be explained by STAHL’S TRIANGLE Hydrophilic Non-Polar E Polar Lipophilic M Active E- ELUENT S- SORBANT M- MIXTURE S Inactive EG:If E- hydrophilic then M- polar & S- inactive 18
  19. 19.  Trial and error - one’s own experience and Literature Normal phase - Stationary phase is polar - Mobile phase is non polar - Non-polar compounds eluted first because of lower affinity with stationary phase - Polar compounds retained because of higher affinity with the stationary phase Reversed phase - Stationary phase is non polar - Mobile phase is polar - Polar compounds eluted first because of lower affinity with stationary phase - Non-Polar compounds retained because of higher affinity with the stationary phase 19
  20. 20. Chromatographic development and drying   After development, remove the plate and mobile phase is removed from the plate to avoid contamination of lab atmosphere Dry in vacuum desiccator 20
  21. 21. Chromatographic Develpment 1. TWIN TROUGH CHAMBER 21
  22. 22. 22
  23. 23. Detection and visualization · Detection under UV light is first choice - non destructive · Spots of fluorescent compounds can be seen at 254 nm (short wave length) or at 366 nm (long wave length) · Spots of non fluorescent compounds can be seen fluorescent stationary phase is used - silica gel GF · Non UV absorbing compounds like ethambutol, dicylomine etc - dipping the plates in 0.1% iodine solution 23
  24. 24. 24
  25. 25. 25
  26. 26. 26
  27. 27. APPLICATIONS           Pharmaceutical research Bio medical analysis Clinical analysis Environment analysis food industry Quantification of herbal extracts Therapeutic drug monitoring to determine its concentration and metabolite in blood urine Analysis of environment pollution level Characterization of hazards in industrial waste Quantitative determination of prostaglandins & thromboxanes in plasma. 27
  28. 28. DIFFERENCES BETWEEN TLC AND HPTLC 28
  29. 29. PARAMETER TLC HPTLC Type of Hand made/pre chromatographic coated plates Pre coated Absorbant layer 200-250mm 100-150mm Particle size 5-20 micrometer 4-8 micrometer Application of sample Manual/semi automatic Semi automatic Shape of sample spot band 29
  30. 30. Spot size 3-6mm 1-2mm Sample volume 1-10 microlit 0.1-2microlit No of sample per 15-20 plate 40-45 Optimal development distance 10-15cm 5-7cm Development time Depend upon mobile phase 40% less than TLC Quantization Manual Manual/ instrumentation Reproducibility of result difficult Reproducible 30
  31. 31. REFERENCES  Ajaz Ahmad, M Mujeeb, Bibhu Prasad Panda (2010) An HPTLC Method for the Simultaneous Analysis of Compactin and Citrinin in Penicillium citrinum Fermentation Broth. Journal of Planar Chromatography-modern TLC 23 (4), 282–285  1994 Rebecca Carrier and Julie Bordonaro - Intro to Biochemical Engineering Term Project, merged with the 1997 project by Kevin Yip  Puri, A., Ahmad, A. and Panda, B. P. (2010), Development of an HPTLCbased diagnostic method for invasive aspergillosis. Biomed. Chromatogr., 24: 887–892. doi: 10.1002/bmc.1382 Wikipedia   Pharmainfo.dot 31
  32. 32. 32

×