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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://sentencedict.com/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,[sentencedict.com] 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.