caa a22 4500 46321966X CHVBK 20180405153208.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1134/S1061934807100152 doi (NATIONALLICENCE)springer-10.1134/S1061934807100152 Determination of formaldehyde by its catalytic effect on the oxidation of pyrogallol red by bromate using flow-injection spectrophotometric detection [Elektronische Daten] [A. Ensafi, Z. Nazemi] This paper reports a simple and sensitive flow-injection method for the spectrophotometric determination of formaldehyde based on the catalytic effect of formaldehyde on the oxidation of pyrogallol red with bromate in acidic media. The decrease in absorbance of the reaction mixture was measured at 470 nm. The calibration graph was linear in the range of 0.47 to 40.0 μ/mL formaldehyde for a sample rate of 30±5 samples per hour. The limit of detection is 0.36 μ/mL. The relative standard deviations for ten replicate measurements of 2.5, 5.0, and 20.0 μ/mL formaldehyde were 3.9, 2.1, and 0.7%, respectively. The method was applied to the determination of formaldehyde in river water, shampoo, and melamine-formaldehyde resin. Pleiades Publishing, Ltd., 2007 Ensafi A. College of Chemistry, Isfahan University of Technology, 84156, Isfahan, Iran aut Nazemi Z. College of Chemistry, Isfahan University of Technology, 84156, Isfahan, Iran aut Journal of Analytical Chemistry Nauka/Interperiodica 62/10(2007-10-01), 987-991 1061-9348 62:10<987 2007 62 10809 https://doi.org/10.1134/S1061934807100152 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807100152 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ensafi A. College of Chemistry, Isfahan University of Technology, 84156, Isfahan, Iran aut NATIONALLICENCE 700 1- Nazemi Z. College of Chemistry, Isfahan University of Technology, 84156, Isfahan, Iran aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/10(2007-10-01), 987-991 1061-9348 62:10<987 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer