Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Richmond J. Ampiah-Bonney"'
Publikováno v:
Journal of Food Composition and Analysis. 118:105214
Publikováno v:
Analytical Sciences. 37:1015-1021
Magnetic dispersive solid phase extraction (MdSPE) was developed to determine the concentration of lead (Pb) in real water samples, while graphene oxide-magnetite-dithizone (GO-Fe3O4-DTZ) from the used graphite tubes (recycled graphite) of electrothe
Publikováno v:
Food chemistry. 375
An effervescent tablet-assisted switchable solvent based liquid phase microextraction (EA-SS-LPME) was developed for multi-element determination of Pb and Cd in various samples using high-resolution continuum source flame atomic absorption spectromet
Autor:
Richmond J. Ampiah-Bonney, Ratana Sananmuang, Wipharat Chuachuad Chaiyasith, Arnon Thongsaw, Yuthapong Udnan
Publikováno v:
Analytical Sciences. 35:1195-1202
A new preconcentration method using solid phase extraction (SPE) was developed by immobilizing dithizone (DZ) and 1,4-diphenylsemicarbazide (DPC) on oxidative activated carbon and then using this for the speciation and preconcentration of mercury spe
Autor:
Wipharat Chuachuad Chaiyasith, Richmond J. Ampiah-Bonney, Ratana Sananmuang, Apinya Sakanupongkul, Yuthapong Udnan
Publikováno v:
Food Chemistry. 277:496-503
A new and simple two-step SFODME using 4-nitro-o-phenylenediamine (4-NOPD) as a chelating agent was developed for mercury speciation in water and fish samples by ETAAS. For the first step, methylmercury was extracted into 1-undecanol and for the seco
Autor:
Pilaipan, Chaikhan, Yuthapong, Udnan, Richmond J, Ampiah-Bonney, Wipharat, Chuachuad Chaiyasith
Publikováno v:
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry. 37(7)
Magnetic dispersive solid phase extraction (MdSPE) was developed to determine the concentration of lead (Pb) in real water samples, while graphene oxide-magnetite-dithizone (GO-Fe
Publikováno v:
Microchemical Journal. 162:105828
A preconcentration method based on a novel hybrid air-assisted solvent terminated dispersive liquid–liquid microextraction (AA-ST-DLLME) using a domestic fish-tank pump as a bubble generator was developed for the determination of Pb in water and be
Autor:
Gareth M. Ross, Arnon Thongsaw, Richmond J. Ampiah-Bonney, Ratana Sananmuang, Wipharat Chuachuad Chaiyasith
Publikováno v:
Food Chemistry. 219:453-458
A method for the determination of cadmium in herb samples based on solidified floating organic drop microextraction (SFODME) using 1-(2-Pyridylazo)-2-naphthol (PAN) as a chelating reagent and detection by electrothermal atomic absorption spectrometry
Autor:
Ratana Sananmuang, Yuthapong Udnan, Richmond J. Ampiah-Bonney, Wipharat Chuachuad Chaiyasith, Pilaipan Chaikhan
Publikováno v:
Microchemical Journal. 159:105355
The objective of this work was to develop a simple microfluidic paper-based analytical device (µPAD) for the determination of paraquat. The µPAD was simply and rapidly made by dipping chromatography paper in melted paraffin. It was observed that th
Autor:
Wipharat Chuachuad Chaiyasith, Richmond J. Ampiah-Bonney, Ratana Sananmuang, Nattawut Dokpikul
Publikováno v:
Food chemistry. 246
A novel method was developed by SAE-DLLME for chromium speciation in water and rice samples using 2-thenoyltrifluoroacetone (TTA) as a chelating reagent by ETAAS. The speciation of Cr(III) and Cr(VI) was achieved by complexation of Cr(III)-TTA and th