New spectrophotometric methods for the determinations of hydrogen sulfide present in the samples of lake water, industrial effluents, tender coconut, sugarcane juice and egg

Fast microplate assay for simultaneous determination of thiols and dissolved sulfides in wastewater

“…5). For sulfides, the methods based on redox reactions are fast but suffers from interferences from other reducing compounds such as nitrites [17]. Three methods compared in Table 1 present fairly similar analytical performance.…”

“…Many easy-to-use microplate kits, usually based on the use of the Ellman's method or fluorescent maleimide derivatives and calibrated using standard solutions of glutathione and/or cysteine, are commercialized for the measurement of free or total thiols in biological samples. Traditional Ellman's reagent can also be used for inorganic sulfides determination and numerous other analytical techniques reported for hydrogen sulfide determination in natural waters or sewage may be mentioned including spectrophotometry [16,17], fluorimetry [18], HPLC coupled to UV-Vis detector [19], inductively coupled plasma-atomic emission spectroscopy [20] or flow systems [21,22].…”

A new method for quantification of total polyphenol content in medicinal plants based on the reduction of Fe(III)/1,10-phenanthroline complexes

“…Hydrogen sulfide was quantified in various samples (wastewater, lake water, coconut, sugarcane juice and egg) in acidic media waiting some minutes for the total reduction of Fe(III) [12].…”