Investigation of Charge Transfer Complex Formation Between Fe(III) and 2,6-Dihydroxy Benzoic Acid and its Applications for Spectrophotometric Determination of Iron in Aqueous Media
On the basis of affinity of Fe(III) ions toward functional groups of 2,6-dihydroxy benzoic acid (2,6-DHB), a charge transfer complex (CT) is formed between Fe(III) ion and 2,6-DHB in acidic media. The stoichiometry and stability constant of the complex was determined using both mole ratio and Job’s...
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| Format: | Article |
| Language: | English |
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Wiley
2009-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2009/417303 |
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| author | Mohammad Saeid Hosseini Sara Madarshahian |
| author_facet | Mohammad Saeid Hosseini Sara Madarshahian |
| author_sort | Mohammad Saeid Hosseini |
| collection | DOAJ |
| description | On the basis of affinity of Fe(III) ions toward functional groups of 2,6-dihydroxy benzoic acid (2,6-DHB), a charge transfer complex (CT) is formed between Fe(III) ion and 2,6-DHB in acidic media. The stoichiometry and stability constant of the complex was determined using both mole ratio and Job’s methods. The stability constant of 1:1 complex formed in acidic media is 2.55±0.14×105 (mole ratio) or 2.70±0.12×105 (Job), in which the quantities are in agreement with together. This method was used for spectrophotometric determination of Fe(III) in aqueous media. The dynamic range and detection limit (DL) were 1.2×10-5 to 3.6×10-4 M and 1.5×10-6 M, respectively. The relative standard deviation (RSD) was found to be 0.76% in the replicate treatments (n=7) with 1.6×10-4 M Fe(III). The practical applicability of the method was confirmed using a synthetic certificated reference material (CRM) and spiked natural water samples. |
| format | Article |
| id | doaj-art-c270e9b2e97c46d9be016087d882ea86 |
| institution | DOAJ |
| issn | 0973-4945 2090-9810 |
| language | English |
| publishDate | 2009-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | E-Journal of Chemistry |
| spelling | doaj-art-c270e9b2e97c46d9be016087d882ea862025-08-20T03:23:15ZengWileyE-Journal of Chemistry0973-49452090-98102009-01-016498599210.1155/2009/417303Investigation of Charge Transfer Complex Formation Between Fe(III) and 2,6-Dihydroxy Benzoic Acid and its Applications for Spectrophotometric Determination of Iron in Aqueous MediaMohammad Saeid Hosseini0Sara Madarshahian1Department of Chemistry, Faculty of Science, Birjand University, Birjand, P.O. Box 414, IranDepartment of Chemistry, Faculty of Science, Birjand University, Birjand, P.O. Box 414, IranOn the basis of affinity of Fe(III) ions toward functional groups of 2,6-dihydroxy benzoic acid (2,6-DHB), a charge transfer complex (CT) is formed between Fe(III) ion and 2,6-DHB in acidic media. The stoichiometry and stability constant of the complex was determined using both mole ratio and Job’s methods. The stability constant of 1:1 complex formed in acidic media is 2.55±0.14×105 (mole ratio) or 2.70±0.12×105 (Job), in which the quantities are in agreement with together. This method was used for spectrophotometric determination of Fe(III) in aqueous media. The dynamic range and detection limit (DL) were 1.2×10-5 to 3.6×10-4 M and 1.5×10-6 M, respectively. The relative standard deviation (RSD) was found to be 0.76% in the replicate treatments (n=7) with 1.6×10-4 M Fe(III). The practical applicability of the method was confirmed using a synthetic certificated reference material (CRM) and spiked natural water samples.http://dx.doi.org/10.1155/2009/417303 |
| spellingShingle | Mohammad Saeid Hosseini Sara Madarshahian Investigation of Charge Transfer Complex Formation Between Fe(III) and 2,6-Dihydroxy Benzoic Acid and its Applications for Spectrophotometric Determination of Iron in Aqueous Media E-Journal of Chemistry |
| title | Investigation of Charge Transfer Complex Formation Between Fe(III) and 2,6-Dihydroxy Benzoic Acid and its Applications for Spectrophotometric Determination of Iron in Aqueous Media |
| title_full | Investigation of Charge Transfer Complex Formation Between Fe(III) and 2,6-Dihydroxy Benzoic Acid and its Applications for Spectrophotometric Determination of Iron in Aqueous Media |
| title_fullStr | Investigation of Charge Transfer Complex Formation Between Fe(III) and 2,6-Dihydroxy Benzoic Acid and its Applications for Spectrophotometric Determination of Iron in Aqueous Media |
| title_full_unstemmed | Investigation of Charge Transfer Complex Formation Between Fe(III) and 2,6-Dihydroxy Benzoic Acid and its Applications for Spectrophotometric Determination of Iron in Aqueous Media |
| title_short | Investigation of Charge Transfer Complex Formation Between Fe(III) and 2,6-Dihydroxy Benzoic Acid and its Applications for Spectrophotometric Determination of Iron in Aqueous Media |
| title_sort | investigation of charge transfer complex formation between fe iii and 2 6 dihydroxy benzoic acid and its applications for spectrophotometric determination of iron in aqueous media |
| url | http://dx.doi.org/10.1155/2009/417303 |
| work_keys_str_mv | AT mohammadsaeidhosseini investigationofchargetransfercomplexformationbetweenfeiiiand26dihydroxybenzoicacidanditsapplicationsforspectrophotometricdeterminationofironinaqueousmedia AT saramadarshahian investigationofchargetransfercomplexformationbetweenfeiiiand26dihydroxybenzoicacidanditsapplicationsforspectrophotometricdeterminationofironinaqueousmedia |