| dc.creator | LUZ OLIVIA LEAL QUEZADA | |
| dc.date | 2011 | |
| dc.date.accessioned | 2022-10-12T19:42:52Z | |
| dc.date.available | 2022-10-12T19:42:52Z | |
| dc.identifier | http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1710 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4120303 | |
| dc.description | Lead (Pb) is a heavy metal whose toxic properties are well documented. An excess of ingested lead poses a health
risk affecting both the nervous system and biosynthesis of hemoglobin. A simple and sensitive flow-injection system
coupled to hydride generation atomic fluorescence spectrometry (HG-AFS) was developed for ultra-trace lead
determination. Plumbane (PbH4) was generated utilizing two methods: in one of them was employed 5% (v/v) H2O2
as an oxidant with 1.5% (m/v) KBH4 as a reducing agent and 1.5% (v/v) HCl solution. The second method involved
1.5% (m/v) K3[Fe(CN)6] as an oxidant/sensitizer, 1% (m/v) KBH4 and 1.5% (v/v) HCl. Variables such as sample and
reagent volumes, flow rates and reagent concentrations were tested. The best results were obtained with potassium
ferricyanide K3[Fe(CN)6], with a detection limit of (0.03 mg L−1) and a RSD of 1.1%. A study of interferences of the
most common interfering ions was also performed. The proposed method was validated by means of certified
reference materials (CRM), which are in good agreement with the certified values. Real samples such as tap water,
mine water and human blood were also measured. This method offers some advantages over conventional laboratory
techniques such as optimum sensitivity, higher sample throughput and the decrease of reagents and sample
consumption. | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/about/cc0/ | |
| dc.subject | info:eu-repo/classification/Hybride generation/Lead | |
| dc.subject | info:eu-repo/classification/Flow injection/Atomic fluorescence | |
| dc.subject | info:eu-repo/classification/cti/2 | |
| dc.subject | info:eu-repo/classification/cti/23 | |
| dc.subject | info:eu-repo/classification/cti/2307 | |
| dc.subject | info:eu-repo/classification/cti/221099 | |
| dc.title | A sensitive flow injection system for lead determination in water and blood samples by HG-AFS | |
| dc.type | info:eu-repo/semantics/conferenceProceedings | |
| dc.type | info:eu-repo/semantics/submittedVersion | |
