Hilda C. dos Santos

Application of factorial designs and Doehlert matrix in optimization of experimental variables associated with the preconcentration and determination of vanadium and copper in seawater by inductively coupled plasma optical emission spectrometry

Sérgio L.C. Ferreira, Adriana S. Queiroz, Marcelo S. Fernandes et al. · Spectrochimica Acta Part B Atomic Spectroscopy · 2002 · 153 citations · Full text

Environmental Chemistry, Environmental Monitoring, Engineering +12

Application of Doehlert matrix and factorial designs in optimization of experimental variables associated with preconcentration and determination of molybdenum in sea-water by inductively coupled plasma optical emission spectrometry

Sérgio L.C. Ferreira, Hilda C. dos Santos, Marcelo S. Fernandes et al. · Journal of Analytical Atomic Spectrometry · 2002 · 68 citations

Engineering, Atomic Emission Spectroscopy, Synthetic Sea-water Solution +22

Determination of Copper, Iron, Nickel, and Zinc in Ethanol Fuel by Flame Atomic Absorption Spectrometry Using On‐Line Preconcentration System

Leonardo S.G. Teixeira, Marcos Almeida Bezerra, Valfredo Azevedo Lemos et al. · Separation Science and Technology · 2005 · 55 citations

Engineering, Atomic Emission Spectroscopy, Fuel Science +16

Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon

Hilda C. dos Santos, Maria Graças A. Korn, Sérgio L.C. Ferreira · Analytica Chimica Acta · 2001 · 50 citations

Environmental Chemistry, Chemical Oceanography, Engineering +7

Sensitive spectrophotometric determination of ascorbic acid in fruit juices and pharmaceutical formulations using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP)

S x E rgio L. C. Ferreira, Marcus L. S. F. Bandeira, Valfredo Azevedo Lemos et al. · Fresenius Journal of Analytical Chemistry · 1997 · 49 citations

Food Chemistry, Ascorbic Acid, Polyphenolics +10