Cloud Point Extraction of Palladium as Chelate with 1-(2-pyridylazo)-2-naphthol Using Triton X-114 Prior to Determination in Real Samples by ETAAS
A pre-concentration and determination methodology for palladium in real samples at ultra-trace levels by 1-(2-pyridylazo)-2-naphthol (PAN) was developed. The analyte in the initial aqueous solution, acidified with HCl, was complexed with PAN and Triton X-114 was added as a surfactant. The surfactant...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Reaserch Institute of Petroleum Industry
2012-01-01
|
| Series: | Journal of Petroleum Science and Technology |
| Subjects: | |
| Online Access: | https://jpst.ripi.ir/article_78_e3abf3f547e8b878ef57286f3e344216.pdf |
| _version_ | 1811212967982661632 |
|---|---|
| author | Y. A. Ghorbani M. H. Sororaddin K. Torkestani |
| author_facet | Y. A. Ghorbani M. H. Sororaddin K. Torkestani |
| author_sort | Y. A. Ghorbani |
| collection | DOAJ |
| description | A pre-concentration and determination methodology for palladium in real samples at ultra-trace levels by 1-(2-pyridylazo)-2-naphthol (PAN) was developed. The analyte in the initial aqueous solution, acidified with HCl, was complexed with PAN and Triton X-114 was added as a surfactant. The surfactant-rich phase was diluted with concentrated HNO3 (65%, w/w) after phase separation. Then, the concentrations of analyte were determined by graphite furnace atomic absorption spectrometry (GF-AAS). The variables affecting the complexation and extraction steps were optimized. Under the optimum conditions, namely a pH of 4.5, a cloud point temperature of 55 °C, the concentration of PAN of 1.2×10<sup>-4</sup> mol l<sup>-1</sup>, 0.1% (W/V) Triton X-114, a sample volume of 1.0 ml, (centrifuged at 3500 rpm) an enhancement factor of 26-fold was reached. Triton X-114 allowed the detection limit of 0.01 ng ml<sup>−1</sup> of Pd. The precision measured as relative standard deviation (R.S.D.) for 10 replicate determinations at 10.0 μg l<sup>−1</sup> Pd was 2.5%. Analytical graphs were rectilinear in the concentration range of 3-200 μg l<sup>−1</sup> and relative standard deviations were lower than 5%. The method affords recoveries in the range of 97 to 101%. The method was successfully applied for the determination of Pd in dust, drinking water, and rainwater samples. |
| first_indexed | 2024-04-12T05:39:21Z |
| format | Article |
| id | doaj.art-e3a42bd7c1c340a0abed457c1fde048d |
| institution | Directory Open Access Journal |
| issn | 2251-659X 2645-3312 |
| language | English |
| last_indexed | 2024-04-12T05:39:21Z |
| publishDate | 2012-01-01 |
| publisher | Reaserch Institute of Petroleum Industry |
| record_format | Article |
| series | Journal of Petroleum Science and Technology |
| spelling | doaj.art-e3a42bd7c1c340a0abed457c1fde048d2022-12-22T03:45:44ZengReaserch Institute of Petroleum IndustryJournal of Petroleum Science and Technology2251-659X2645-33122012-01-0121505410.22078/jpst.2012.7878Cloud Point Extraction of Palladium as Chelate with 1-(2-pyridylazo)-2-naphthol Using Triton X-114 Prior to Determination in Real Samples by ETAASY. A. GhorbaniM. H. Sororaddin0K. Torkestani1Analytical Chemistry Department, Faculty of Chemistry, Tabriz UniversityAnalytical Group, Research Institute of Petroleum IndustryA pre-concentration and determination methodology for palladium in real samples at ultra-trace levels by 1-(2-pyridylazo)-2-naphthol (PAN) was developed. The analyte in the initial aqueous solution, acidified with HCl, was complexed with PAN and Triton X-114 was added as a surfactant. The surfactant-rich phase was diluted with concentrated HNO3 (65%, w/w) after phase separation. Then, the concentrations of analyte were determined by graphite furnace atomic absorption spectrometry (GF-AAS). The variables affecting the complexation and extraction steps were optimized. Under the optimum conditions, namely a pH of 4.5, a cloud point temperature of 55 °C, the concentration of PAN of 1.2×10<sup>-4</sup> mol l<sup>-1</sup>, 0.1% (W/V) Triton X-114, a sample volume of 1.0 ml, (centrifuged at 3500 rpm) an enhancement factor of 26-fold was reached. Triton X-114 allowed the detection limit of 0.01 ng ml<sup>−1</sup> of Pd. The precision measured as relative standard deviation (R.S.D.) for 10 replicate determinations at 10.0 μg l<sup>−1</sup> Pd was 2.5%. Analytical graphs were rectilinear in the concentration range of 3-200 μg l<sup>−1</sup> and relative standard deviations were lower than 5%. The method affords recoveries in the range of 97 to 101%. The method was successfully applied for the determination of Pd in dust, drinking water, and rainwater samples.https://jpst.ripi.ir/article_78_e3abf3f547e8b878ef57286f3e344216.pdfcloud point extractiongraphite furnace atomic absorption spectrometrypd1-(2-pyridylazo)-2-naphtholtriton x-114 |
| spellingShingle | Y. A. Ghorbani M. H. Sororaddin K. Torkestani Cloud Point Extraction of Palladium as Chelate with 1-(2-pyridylazo)-2-naphthol Using Triton X-114 Prior to Determination in Real Samples by ETAAS Journal of Petroleum Science and Technology cloud point extraction graphite furnace atomic absorption spectrometry pd 1-(2-pyridylazo)-2-naphthol triton x-114 |
| title | Cloud Point Extraction of Palladium as Chelate with 1-(2-pyridylazo)-2-naphthol Using Triton X-114 Prior to Determination in Real Samples by ETAAS |
| title_full | Cloud Point Extraction of Palladium as Chelate with 1-(2-pyridylazo)-2-naphthol Using Triton X-114 Prior to Determination in Real Samples by ETAAS |
| title_fullStr | Cloud Point Extraction of Palladium as Chelate with 1-(2-pyridylazo)-2-naphthol Using Triton X-114 Prior to Determination in Real Samples by ETAAS |
| title_full_unstemmed | Cloud Point Extraction of Palladium as Chelate with 1-(2-pyridylazo)-2-naphthol Using Triton X-114 Prior to Determination in Real Samples by ETAAS |
| title_short | Cloud Point Extraction of Palladium as Chelate with 1-(2-pyridylazo)-2-naphthol Using Triton X-114 Prior to Determination in Real Samples by ETAAS |
| title_sort | cloud point extraction of palladium as chelate with 1 2 pyridylazo 2 naphthol using triton x 114 prior to determination in real samples by etaas |
| topic | cloud point extraction graphite furnace atomic absorption spectrometry pd 1-(2-pyridylazo)-2-naphthol triton x-114 |
| url | https://jpst.ripi.ir/article_78_e3abf3f547e8b878ef57286f3e344216.pdf |
| work_keys_str_mv | AT yaghorbani cloudpointextractionofpalladiumaschelatewith12pyridylazo2naphtholusingtritonx114priortodeterminationinrealsamplesbyetaas AT mhsororaddin cloudpointextractionofpalladiumaschelatewith12pyridylazo2naphtholusingtritonx114priortodeterminationinrealsamplesbyetaas AT ktorkestani cloudpointextractionofpalladiumaschelatewith12pyridylazo2naphtholusingtritonx114priortodeterminationinrealsamplesbyetaas |