PMID- 16966814
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20070618
LR  - 20190827
IS  - 0910-6340 (Print)
IS  - 0910-6340 (Linking)
VI  - 22
IP  - 9
DP  - 2006 Sep
TI  - An improved colorimetric determination of lead(II) in the presence of nonionic 
      surfactant.
PG  - 1227-31
AB  - Phenanthraquinone monophenyl thiosemicarbazone (PPT), an excellent color-forming 
      chelating agent, combines to Pb(II) to form a slightly soluble complex in aqueous 
      solution. To determine this metal ion, a tedious and time-consuming separation 
      technique, such as liquid-liquid extraction, has to be performed. However, the 
      Pb(II)-PPT complex could be determined conveniently by ultraviolet-visible 
      (UV-Vis) spectrophotometry at 520 nm in a Tween 80 micellar medium that has 
      polyoxyethylene groups. After conditions, such as the pH, the concentration of 
      PPT and the stability, were adjusted to their optimum values, the sensitivities 
      of the Pb(II) ions in the Tween 80 micellar medium and in chloroform were 
      compared. It was shown that the sensitivity of Pb(II) in the Tween 80 micellar 
      medium was higher than in chloroform. The interference from different cations and 
      anions was studied. Beer's law was obeyed over a concentration range of 0-40 
      microg ml(-1). The detection limit of Pb(II) was 0.036 microg ml(-1). The 
      recovery yields of the lead(II) in the synthetic mixtures and water samples 
      ranged from 98 to 99.8%, and their relative standard deviations (RSD) were below 
      4%. The proposed method was successfully applied to the determination of lead in 
      certified reference samples, biological samples and in environmental water 
      samples.
FAU - Akl, Magda Ali
AU  - Akl MA
AD  - Chemistry Department, Faculty of Science, Mansoura University, Egypt. 
      magdaakl_59@hotmail.com
LA  - eng
PT  - Journal Article
PL  - Switzerland
TA  - Anal Sci
JT  - Analytical sciences : the international journal of the Japan Society for 
      Analytical Chemistry
JID - 8511078
EDAT- 2006/09/13 09:00
MHDA- 2006/09/13 09:01
CRDT- 2006/09/13 09:00
PHST- 2006/09/13 09:00 [pubmed]
PHST- 2006/09/13 09:01 [medline]
PHST- 2006/09/13 09:00 [entrez]
AID - JST.JSTAGE/analsci/22.1227 [pii]
AID - 10.2116/analsci.22.1227 [doi]
PST - ppublish
SO  - Anal Sci. 2006 Sep;22(9):1227-31. doi: 10.2116/analsci.22.1227.