1. A simple gradient elution device and a UV - Vis spectrophotometric detector for HPLC was de, signed.

2. Gradient elution chromatography was applied to determine the ginsenoside contents in Shengmai injections.

3. Through 2 - Stepwise elution chromatography , tea polyphenols ( Tp ) and caffeine were separated from tea with macroporous resin.

4. METHODS: Conditions for the elution were studies under the condition of the content of total arasaponin.

5. Results Saponins in 80 % ethanol elution was the highest and over %.

6. Complex elution systems and post - column complex reaction systems are separately explored in detail.

7. Different elution systems were selected by TLC to establish analytical methods of measurement of radiochemistry of 18F-FDG in this paper, and compared with HPLC of the same sample.

8. Both gradient and isocratic elution are described for rapid selection of starting condition for modifier optimization in reversed-phase HPLC.

9. The conditions of adsorption and elution of mercury on amidoxime chelate fiber are studied.

10. The properties of molybdenum adsorption and elution of D380 macro -porous weak base anion exchange resin have been studied with dynamic state method.

11. Zorbax ODS column and gradient elution of acetonitrile acetic acid solution as mobile phase were employed to determine the content of syringin and rutin in 11 species of Saussurea by RP_HPLC.

12. A five step sequential elution procedure with or without supersonic effect was tested for extraction of foliar dust from leaves of Euonymus japonicus collected at two locations of Beijing urban area.

13. Gradient elution HPLC was used to analyze methanol extracts from white muscardine silkworm[http:///elution.html], and analyzed the data of their fingerprints by similarity.

14. The paper chromatography-mottle elution chronometry is established which is a simple and convenient and accurate method of quantitatively determining L-leucine.

15. Objective:To optimizing the elution requirement of separating and purifying the nuciferine of lotus leaf by Macroporous adsorptive resins.

16. The HPLC was subjected to gradient elution and negative ion mode was adopted in mass spectrum.

17. The process of passing the solvent through the column is called elution.

18. The time taken for a component to pass through the column is called its elution time.

19. According to the equation of chromatographic dynamics, we can get the second central moment and the third central moment of elution curve of HPLC under linear nonideal conditions.

20. These results indicate that DEAE-cellulose exchangers prepared in our laboratory have high adsorption capacity for protein and elution with ease.

21. Methods: Chromatographic fingerprint of Coleus forskohlii was investigated by HPLC - ELSD and gradient elution modeseparation.

22. The determination was performed on a C18 column to separate Fancy Red form tartrazine, amaranth, Ponceau 4R, Sunset Yellow and Brilliant Blue by gradient elution.

23. The effective and active components in bamboo leaves were separated using gradient elution and column chromatography.

24. Results and Conclusion The cross - linking reaction of gelatin didn t affect the medical elution.

25. Slip mechanism was able to counteract the weaknesses of plate theory; its elution curve function could authentically express actual elution curves.

26. Ammonium chloride is a better eluant, and L-leucine and L-valine can be separated successfully by gradient elution.

27. Chloroform - tetrahydrofuran - water(500: 500: 8) was used as mobile phase for the gradient elution of other strongly retained substances.

28. The kind of eluant and the concentration of eluant have effect on elution.

29. Extracted ion chromatograms for protein chromatography based on peptide elution were generated.

30. Methods: (1)To separate stilbene glycoside by using silica gel column chromatography with gradient elution consisting of ethyl acetate and petroleum ether.

31. Results Saponins in 80 % ethanol elution was the highest and over 36 %.

32. Evaluated by recovery, the influence of concentration of sample, pH, concentration of eluant and flow rate of elution had been investigated by orthogonal experimental design.

33. The technological process of recovering copper and bismuth in wet handling elution residue by adding pyrolusite as oxidizing agents under the condition of ordinary pressure, low temperature, acidity.

34. The adsorption and elution of aqueous sulfosalicylic acid solution with 717 anion exchange resin were investigated by using dynamic and static methods.

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35. The process includes elution of urine collected with filter paper, oximation reaction, extraction, methyl silane derivation, and united detection with chromatographic instrument and mass spectrograph.

36. The 3%LM-solubilized fractions are separated by different methods: sucrose density gradient ultracentrifugation, anion exchange column, molecular size elution column.

37. Methods: Chromatographic fingerprint of Coleus forskohlii was investigated by HPLC-ELSD and gradient elution mode was applied to chromatographic separation.

38. A further study is made on the condition of adsorption, cross linking and elution of this molecular engram polymer as well as its adsorbability on TPT.

39. Lignocellulose was prepared from cedar sawdust and used to isolate caffeine and tea catechins from tea extract by static adsorption and gradient elution using water and 80% ethanol.

40. Secondly, type of elution was considered and type of isocratic elution was attempted firstly.

41. The technics of adsorption and elution of nuciferine with polyamide resins as adsorbent was studied.

42. Objective To examine the cross - linking reaction of gelatin hard capsule and the influence on medical elution.

43. Synthetic peptide purification. Are isocratic elution and volume overload options to improve process economics?

44. The method that on-line elution in descending and horizontal development and the in-situ elution provide many new operations for the chromatographer.

45. The last part mainly determines the elution forms of estate duty and prevention means.

46. Objective To select the optimum resin of adsorption and elution of piceid Polygonum cuspidatum.

47. The rates of adsorption and elution, and the sensitivity of the hemagglutinin to inhibitors vary with the different influenza.

48. With these elution solutions dried, their contents of N -nor- nuciferine, O - norciferine, and nuciferine were 44.01%, 7.61%, and 68.52% in the relative solid, respectively.

49. In order to have a high elution rate, the ethanol with the concentration of 70% could be used as eluant .

50. By elution experiment, char yield loss of wood treated by ammonium phosphate is 26.7%, compared to 4.27% by tetrabromobisphenol A.

51. On SDS-polyacrylamide gel electrophoresis (SDS-PAGE)the eluate from the column with the McAb coupled showed a single band, corresponding to the elution peak.

52. Different elution fractions from pummelo peel extract exhibit different antioxidative activity.

53. The extracted phenols were detected by an ODS column, gradient elution and programmable UV wavelength detector.

54. This paper describes the direct recovery of gold and silver from the thiourea and sulphuric acid eluate of the loaded resin elution by using electrowinning in the diaphragm electrolyzer.

55. MethodsThe orthogonal test was adopted to study the eluting effect of MDG with the elution rate as an index, and concentration of eluant, amount, elution velocity as the influence factors.

56. The adsorption and elution of mercury by amidoxime chelate fiber have been investigated.