title: A visual strip sensor for determination of iron.
abstract: A visual strip has been developed for sensing iron in different aqueous samples like natural water and fruit juices. The sensor has been synthesized by UV-radiation induced graft polymerization of acrylamide monomer in microporous poly(propylene) base. For physical immobilization of iron selective reagent, the in situ polymerization of acrylamide has been carried out in the presence of 1,10-phenanthroline. The loaded strip on interaction with Fe(II) in aqueous solution turned into orange red color and the intensity of the color was found to be directly proportional to the amount of Fe(II) in the aqueous sample. The minimal sensor response with naked eye was found for 50ngmL(-1) of Fe in 15min of interaction. However, as low as 20ngmL(-1) Fe could be quantified using a spectrophotometer. The detection limit calculated using the 3s/S criteria, where 's' is the standard deviation of the absorbance of blank reagent loaded strip and 'S' is the slope of the linear calibration plot, was 1.0ngmL(-1). The strip was applied to measure Fe in a variety of samples such as ground water and fruit juices.
authors.affiliation: Analytical Chemistry Division, BARC, Trombay, Mumbai 400085, India. Electronic address: sanjuktaak301@gmail.com.
authors.forename: Sanjukta A
authors.initials: SA
authors.lastname: Kumar
authors.affiliation: Analytical Chemistry Division, BARC, Trombay, Mumbai 400085, India.
authors.forename: Neha
authors.initials: N
authors.lastname: Thakur
authors.affiliation: Analytical Chemistry Division, BARC, Trombay, Mumbai 400085, India.
authors.forename: Harshala J
authors.initials: HJ
authors.lastname: Parab
authors.affiliation: Analytical Chemistry Division, BARC, Trombay, Mumbai 400085, India.
authors.forename: Shailaja P
authors.initials: SP
authors.lastname: Pandey
authors.affiliation: Radiochemistry Division, BARC, Trombay, Mumbai 400085, India.
authors.forename: Rakesh N
authors.initials: RN
authors.lastname: Shinde
authors.affiliation: Radiochemistry Division, BARC, Trombay, Mumbai 400085, India.
authors.forename: Ashok K
authors.initials: AK
authors.lastname: Pandey
authors.affiliation: Analytical Chemistry Division, BARC, Trombay, Mumbai 400085, India.
authors.forename: Sangita D
authors.initials: SD
authors.lastname: Kumar
authors.affiliation: Analytical Chemistry Division, BARC, Trombay, Mumbai 400085, India.
authors.forename: A V R
authors.initials: AV
authors.lastname: Reddy
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D007501:Iron / Q000032:analysis*; D057230:Limit of Detection; D008958:Models, Molecular; D008968:Molecular Conformation; D058105:Polymerization; D011126:Polypropylenes / Q000737:chemistry; D011786:Quality Control; D011934:Reagent Strips / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D007501:Iron; D011126:Polypropylenes; D011934:Reagent Strips; D014867:Water; D000099166:Polyacrylamides
keywords: 1,10-Phenanthroline; Acrylamide; Ground water; Iron; Poly(propylene); Visual strip sensor