A new catalytic-spectrophotometric method for quantification of trace amounts of nitrite in fruit juice samples

WITHDRAWN: Preconcentration and indirect quantification of trace nitrite, nitrate and total nitrite in selected beverage and milk samples using ion-pairing cloud-point extraction with acridine orange

“…and IPC with chemiluminescence detection (Gallignani et al, 2004;653 Khan et al, 2012;Luiz et al, 2012;Shiddiky et al, 2009;Ensafi and 654 Amini, 2012; Sobhanardakani et al, 2013;Chen et al, 2008;655 Guanghan et al, 1997;Santos et al, 2009;Mesaros et al, 1997;656 Kodamatani et al, 2009656 Kodamatani et al, , 2011) are generally Q2 time-consuming, 657 excess solvent consumption, expensive, selective, simple and/or 658 complicated instruments, which needs an experienced user in her/ 659 his area according to spectrophotometer, which is available in 660 almost every research laboratory. Moreover, some of these 661 techniques might not be always available in all routine analytical 662 laboratories.…”

Determination of Trace Levels of Nitrite in Beverages Samples Through Micellar Improved Catalytic Kinetic Spectrophotometry

“…After 5 min, the samples were filtered using a membrane filter (0.45 mm pore size) and centrifuged for 10 min at 4000 rpm. Five milliliters of each sample solution were used for real sample analysis [28]. Also, a blank extraction process was carried out through the same procedure.…”