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279 results on '"Dilution"'

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1. Feed injection in liquid chromatography: Reducing the effect of large-volume injections from purely organic diluents in reversed-phase liquid chromatography.

2. Isomers-oriented separation of forty-five plasma bile acids with liquid chromatography-tandem mass spectrometry.

3. Enhancing LOD determination in gas chromatography: Validating the Hubaux-Vos method for gas concentration measurement.

4. Theoretical and practical guidelines for solvent dilution between the two dimensions in online comprehensive two-dimensional liquid chromatography.

5. Dilute-and-shoot approach combined with in-situ formed metal-containing ionic liquids for extraction of benzophenone and related compounds from açaí-based food products.

6. Parameter-by-parameter estimation method for adsorption isotherm in hydrophobic interaction chromatography.

7. An alternative general model for the effective longitudinal diffusion in chromatographic beds filled with ordered porous particles.

8. Simultaneous quantification of acidic and basic flupirtine metabolites by supercritical fluid chromatography according to European Medicines Agency validation.

9. A fully automated approach for the analysis of 37 psychoactive substances in raw wastewater based on on-line solid phase extraction-liquid chromatography-tandem mass spectrometry.

10. High-throughput gas chromatography-mass spectrometry analysis of pesticide residues in spices by using the enhanced matrix removal-lipid and the sample dilution approach.

11. Improved separation by at-column dilution in preparative hydrophilic interaction chromatography.

12. Continuous protein concentration via free-flow moving reaction boundary electrophoresis.

13. Evaluation of uncertainty sources in the determination of testosterone in urine by calibration-based and isotope dilution quantification using ultra high performance liquid chromatography tandem mass spectrometry.

14. Theoretical and experimental comparison of one dimensional versus on-line comprehensive two dimensional liquid chromatography for optimized sub-hour separations of complex peptide samples.

15. Improvement of the performances of a tandem simulated moving bed chromatography by controlling the yield level of a key product of the first simulated moving bed unit.

16. Diluting modulation-based two dimensional-liquid chromatography coupled with mass spectrometry for simultaneously determining multiclass prohibited substances in cosmetics.

17. Continuous protein refolding and purification by two-stage periodic counter-current chromatography.

18. Enhancing the compatibility of normal-phase chromatography x reversed−phase chromatography by combination of low−temperature sensitive aqueous-phase compatible normal- phase chromatography and at−column dilution modulation.

19. Accurate determination of four tetracycline residues in chicken meat by isotope dilution-liquid chromatography/tandem mass spectrometry.

20. Application of fractionized sampling and stacking for construction of an interface for online heart-cutting two-dimensional liquid chromatography.

21. Rhamnolipid biosurfactant analysis using online turbulent flow chromatography-liquid chromatography-tandem mass spectrometry.

22. Dilution standard addition calibration: A practical calibration strategy for multiresidue organic compounds determination.

23. Detection of 1,N2-propano-2′-deoxyguanosine adducts in genomic DNA by ultrahigh performance liquid chromatography-electrospray ionization-tandem mass spectrometry in combination with stable isotope dilution.

24. Automated two-step chromatography using an ÄKTA equipped with in-line dilution capability.

25. Comprehensive comparative compositional study of the vapour phase of cigarette mainstream tobacco smoke and tobacco heating product aerosol

26. Optimization of conditions in on-line comprehensive two-dimensional reversed phase liquid chromatography. Experimental comparison with one-dimensional reversed phase liquid chromatography for the separation of peptides.

27. Development and validation of a stable-isotope dilution liquid chromatography–tandem mass spectrometry method for the determination of bisphenols in ready-made meals.

28. On-line two-dimensional countercurrent chromatography × high performance liquid chromatography system with a novel fragmentary dilution and turbulent mixing interface for preparation of coumarins from Cnidium monnieri.

29. A validated ultra-high-performance liquid chromatography–tandem mass spectrometry method for the selective analysis of free and total folate in plasma and red blood cells.

30. Development of an equilibrium headspace gas chromatographic method for the measurement of noncovalent association and partitioning of n-alkylbenzenes at infinite dilution in fulvic acid pseudophase.

31. Multi-residue analytical method for detecting pesticides, veterinary drugs, and mycotoxins in feed using liquid- and gas chromatography coupled with mass spectrometry.

32. Infinite dilution partial molar volumes of platinum(II) 2,4-pentanedionate in supercritical carbon dioxide.

33. An automatic versatile system integrating solid-phase extraction with ultra-high performance liquid chromatography–tandem mass spectrometry using a dual-dilution strategy for direct analysis of auxins in plant extracts.

34. Optimization study for metabolomics analysis of human sweat by liquid chromatography–tandem mass spectrometry in high resolution mode.

35. Effects of large volume injection of aliphatic alcohols as sample diluents on the retention of low hydrophobic solutes in reversed-phase liquid chromatography.

36. Selective multiresidue determination of highly polar anionic pesticides in plant-based milk, wine and beer using hydrophilic interaction liquid chromatography combined with tandem mass spectrometry

37. Predictive kinetic optimisation of hydrophilic interaction chromatography × reversed phase liquid chromatography separations: Experimental verification and application to phenolic analysis

38. Multi-residue pesticide analysis in virgin olive oil by nanoflow liquid chromatography high resolution mass spectrometry

39. Evaluation of mutual interference between bovine α-lactalbumin peptide and its isotope-labeled peptide in whey protein analysis using liquid chromatography-tandem mass spectrometry

40. Improved separation by at-column dilution in preparative hydrophilic interaction chromatography

41. Method development for optimizing analysis of ignitable liquid residues using flow-modulated comprehensive two-dimensional gas chromatography

42. Fast methodology for the reliable determination of nonylphenol in water samples by minimal labeling isotope dilution mass spectrometry.

43. Supported liquid membrane extraction coupled in-line to commercial capillary electrophoresis for rapid determination of formate in undiluted blood samples.

44. Capillary electrophoresis with contactless conductometric detection for rapid screening of formate in blood serum after methanol intoxication

45. Diffusion coefficients of phenylbutazone in supercritical CO2 and in ethanol

46. Consequences of cavity size and chemical environment on the adsorption properties of isoreticular metal-organic frameworks: An inverse gas chromatography study

47. Influence of relative humidity on the properties of examined materials by means of inverse gas chromatography

48. Study on the performance of different types of three-dimensional chromatographic systems

49. Dependence of chromatographic retention indices on a ratio of amounts of target and reference compounds

50. Surface properties of calcium and magnesium oxide nanopowders grafted with unsaturated carboxylic acids studied with inverse gas chromatography

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