Nisha Sharma
Savitribai Phule Pune University
Linear rangeAnalytical chemistryDetection limitDrop (liquid)Mass spectrometryInorganic chemistryHigh-performance liquid chromatographyAqueous solutionChemistryGas chromatography–mass spectrometryNitriteThiocyanateDerivatizationDivinylbenzeneTolidineCyanideSolid-phase microextractionSample preparationIodideNinhydrinSpectrophotometrySolventHydroxylammonium chlorideArylAscorbic acidReagentChromatographyExtraction (chemistry)ChlorineMercury (element)Solid phase extraction
7Publications
5H-index
104Citations
Publications 4
Newest
#1Nisha Sharma (Rani Durgavati University)H-Index: 5
#2Archana Jain (Rani Durgavati University)H-Index: 23
Last. Krishna K. Verma (Rani Durgavati University)H-Index: 24
view all 3 authors...
A sensitive and solvent-free procedure for the determination of aromatic amines in environmental and food samples was studied using solid-phase microextraction (SPME) for on-fibre derivatization and gas chromatography-mass spectrometry (GC-MS). The analytical procedure involved headspace impregnation of allyl isothiocyanate on the SPME fibre and then extraction/derivatization of aromatic amines by placing impregnated fibre in the headspace of the sample. The allyl thiourea derivatives were pyrol...
17 CitationsSource
#1Nisha Sharma (Rani Durgavati University)H-Index: 5
#2Archana Jain (Rani Durgavati University)H-Index: 23
Last. Krishna K. Verma (Rani Durgavati University)H-Index: 24
view all 4 authors...
Abstract Solid-phase extraction (SPE) of phenol and chlorophenols, their derivatization to methyl ethers, headspace single-drop microextraction (HS-SDME) of methyl ethers using 1-butanol as extraction solvent, and direct transfer of the drop into the injector for high performance liquid chromatography with diode array detection (HPLC-DAD) have been reported. A flanged-end polytetrafluoroethylene sleeve, 3 mm × 0.5 mm, placed at the tip of the syringe needle, allowed the use of 10 μL solvent drop...
34 CitationsSource
#1Archana Jain (Rani Durgavati University)H-Index: 23
#2Aradhana K.K.V. Pillai (Rani Durgavati University)H-Index: 8
Last. Krishna K. Verma (Rani Durgavati University)H-Index: 24
view all 4 authors...
Abstract Headspace single-drop microextraction has been used for the determination of cyanide with ninhydrin in combination with fibre-optic-based cuvetteless microspectrophotometry which accommodates sample volume of 1 μL placed between the two ends of optical fibres, and has been found to avoid salient drawbacks of batch methods. This method involved hydrocyanic acid formation in a closed vial, and simultaneous extraction and reaction with 2 μL drop of ninhydrin in carbonate medium suspended a...
21 CitationsSource
#1Nisha Sharma (Rani Durgavati University)H-Index: 5
#2Aradhana K.K.V. Pillai (Rani Durgavati University)H-Index: 8
Last. Krishna K. Verma (Rani Durgavati University)H-Index: 24
view all 5 authors...
Abstract Liquid-phase microextraction (LPME) has been investigated for trace analysis in the present work in conjunction with fibre-optic-based micro-spectrophotometry which accommodates sample volume of 1 μL placed between the two ends of optical fibres. Methods have been evolved for the determination of (i) 1–100 μM and 0.5–20 μM of thiols by single drop microextraction (SDME) and LPME in 25 μL of the organic solvent, respectively, involving their reaction with the Ellman reagent and ion pair ...
27 CitationsSource