171 results on '"Apyari, V. V."'
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2. Magnetic Solid-Phase Extraction with Dispersion of Magnetic Hypercrosslinked Polystyrene by Carbon Dioxide for the Extraction of Amphenicols from Honey and Milk in Their Determination by HPLC–MS/MS
3. Methods for the Extraction of Organic Compounds from Solid Samples: 1. Solvent Extraction. Review of Reviews
4. Dispersive and Magnetic Solid-Phase Extraction of Organic Compounds: Review of Reviews
5. A Sorption–Spectrometric Method for Quantitation of Catecholamines in Urine and Plasma Using Hypercrosslinked Polystyrene and Gold Nanorods or Their Nanocomposites
6. Silver Triangular Nanoplates as Analytical Reagents in Optical Molecular Absorption Spectroscopy: Possibilities and Prospects
7. Monitor Calibrator as an Alternative to Spectrofluorimeter: Determination of Quinine in Beverages and Medicinal Preparations
8. Prospects for the Use of Analytical Systems Based on Silver Triangular Nanoplates for the Spectrophotometric Determination of Reductants
9. Rapid Hydrolysis and Derivatization of Nitrofuran Metabolites with a New Derivatizing Agent 5-Nitro-2-Furaldehyde in Their Determination in Chicken Meat by HPLC-MS/MS
10. Sorption of Amphenicols on Magnetic Hypercrosslinked Polystyrene
11. A New Derivatizing Agent for Determining Nitrofuran Metabolites in Chicken Eggs by High-Performance Liquid Chromatography-Tandem Mass Spectrometry
12. Using Hypercrosslinked Polystyrene for the Multicomponent Solid-Phase Extraction of Residues of 63 Veterinary Preparations in Their Determination in Chicken Meat by High-Performance Liquid Chromatography-Tandem Mass Spectrometry
13. Liquid-Liquid Extraction of Organic Compounds into a Single Drop of the Extractant: Overview of Reviews
14. Determination of Melamine by Diffuse Reflectance Spectroscopy by its Effect on the Formation of a Gold-Polyurethane Foam Nanocomposite
15. Homogeneous Liquid-Liquid Microextraction of Organic Compounds
16. Dispersive Liquid-Liquid Microextraction of Organic Compounds: An Overview of Reviews
17. Determination of Cysteine by Diffuse Reflectance Spectroscopy by Its Influence on the Formation of Gold Nanocomposites Based on Polyurethane Foam
18. Preconcentration of Catecholamins on Hypercrosslinked Polystyrene and Their Determination by High-Performance Liquid Chromatography
19. Kinetics of the Interaction between Thio-Compounds and Triangular Silver Nanoplates in an Aqueous Solution
20. One-Step Dyeing of Polyurethane Fibers
21. NEW NANOCOMPOSITE MATERIAL BASED ON POLYURETHANE FOAM MODIFIED WITH SILVER TRIANGULAR NANOPLATES AS A SOLID-PHASE ANALYTICAL REAGENT FOR DETERMINATION OF MERCURY(II)
22. Analytical Response of Sensor Arrays Based on Photonic Crystals: Measurements of Diffuse Reflectance
23. Gold and Silver Nanoparticles in Optical Molecular Absorption Spectroscopy
24. Colorimetry in Chemical Analysis
25. Application of Hypercrosslinked Polystyrenes to the Preconcentration and Separation of Organic Compounds and Ions of Elements
26. Sorption of Triangular Silver Nanoplates on Polyurethane Foam
27. 9. Molecularly Imprinted Polymers: Synthesis, Properties, and Application in Analysis of Real Samples
28. Adsorption preconcentration of synthetic anionic food dyes
29. Preparation of reagent indicator papers with silver triangular nanoplates for chemical analysis
30. Sorption of gold nanorods on polyurethane foam as a way to obtain a nanocomposite material with a surface plasmon resonance for chemical analysis purposes
31. Spectrophotometric determination of the total concentration of sulfonamides in milk after adsorption separation using magnetic hypercrosslinked polystyrene
32. Magnetic adsorbents based on iron oxide nanoparticles for the extraction and preconcentration of organic compounds
33. A polymeric magnetic adsorbent based on Fe3O4 nanoparticles and hypercrosslinked polystyrene for the preconcentration of tetracycline antibiotics
34. Spectrophotometric determination of sulfates using silver nanoparticles stabilized with 6,6-ionene
35. Adsorption of Sunset Yellow FCF food dye from aqueous solutions and its determination by diffuse reflectance spectroscopy
36. Methods for the separation, preconcentration, and determination of tetracycline antibiotics
37. Sorption of tetracycline antibiotics on hyper-crosslinked polystyrene from aqueous and aqueous-organic media
38. Preconcentration of tetracycline antibiotics on a hyper-crosslinked polystyrene and their determination in waters by high-performance liquid chromatography
39. Determination of polyhexamethyleneguanidine hydrochloride using gold nanoparticles and polyurethane foam
40. Sorption of Ponceau 4R anionic dye from aqueous solutions on aluminum oxide and polyurethane foam
41. Using gold nanoparticles in spectrophotometry
42. Comparison of adsorbents for the preconcentration of sulfanilamides from aqueous solutions prior to HPLC determination
43. Sorption of food dyes on polyurethane foam and aluminum oxide
44. Selection of sorbent for oxytetracycline preconcentration from solutions
45. Specifics of separation of flavonoids by reverse phase high performance liquid chromatography on the Luna 5u C18(2) column
46. Methods of extraction, preconcentration, and determination of quercetin
47. Analytical possibilities of digital colorimetry: Determination of nitrite using polyurethane foam
48. An Eye-One Pro mini-spectrophotometer as an alternative to diffuse reflectance spectrometer
49. Use of polyurethane foam and 3-hydroxy-7,8-benzo-1,2,3,4-tetrahydroquinoline for determination of nitrite by diffuse reflectance spectroscopy and colorimetry
50. Using a digital camera and computer data processing for the determination of organic substances with diazotized polyurethane foams
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