. Conclusions
This paper describes the use of single-drop microextraction and
fibre optics-based cuvetteless UV–Vis micro-spectrophotometry
for the simple, rapid and sensitive determination of nitrite in
water samples. The proposed method meets the demands towards
greener methodologies, as may be inferred from the nature of
SDME, which entails reduced reagent consumption and waste
generation. The miniaturized Griess assay would allow the determination
of nitrite in a variety of samples at low concentrations
with minimun sample handling.