title: Pre-concentration and determination of tartrazine dye from aqueous solutions using modified cellulose nanosponges.
abstract: In this study, a new absorbent based on cellulose nanosponges modified with methyltrioctylammonium chloride (aliquat 336) was prepared and used for pre-concentration, removal and determination of tartrazine dye, using UV-vis spectrophotometry. This adsorbent was fully characterized using various instrumental techniques such as SEM, FTIR and XRD spectra. The pre-concentration and removal procedures were studied in column and batch modes, respectively. The effects of parameters such as pH of the aqueous medium, methyltrioctylammounium chloride dose, adsorbent amount, desorbing conditions and interfering ions on the adsorption of tartrazine were investigated and optimized. The fitting experimental data with conventional isotherm models revealed that the adsorption followed the Brunauer-Emmett-Teller (BET) model and the maximum adsorption capacity for tartrazine was 180mg/g with modified nanosponges. Under the optimized conditions, the calibration curve was linear over the range of 2-300ng/mL and the limit of detection was 0.15ng/mL. The relative standard deviation (RSD) for 20 and 100ng/mL of tartrazine were 3.1% and 1.5%, respectively. The proposed method was applied for pre-concentration and determination of tartrazine dye in different water samples.
authors.affiliation: Food and Drug Safety Evaluation Research Center of Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Roohollah
authors.initials: R
authors.lastname: Shiralipour
authors.affiliation: Department of Marine Chemistry, Faculty of Marine Science & Marine Science Research Institute, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran. Electronic address: arash_larki@yahoo.com.
authors.forename: Arash
authors.initials: A
authors.lastname: Larki
mesh_terms: D000327:Adsorption; D002482:Cellulose / Q000737:chemistry*; D004396:Coloring Agents / Q000032:analysis* / Q000737:chemistry; D007700:Kinetics; D049329:Nanostructures / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012996:Solutions; D013645:Tartrazine / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods
chemical_list: D004396:Coloring Agents; D000644:Quaternary Ammonium Compounds; D012996:Solutions; D014874:Water Pollutants, Chemical; C037759:trioctylmethylammonium; D002482:Cellulose; D013645:Tartrazine
keywords: Aliquat 336; Brunauer-Emmett-Teller; Cellulose nanosponges; Methyltrioctylammounium chloride; Tartrazine