Spectrophotometric detremination of Lead in Environment Samples by Benzoic acid Azo PhenylCalix[4]arene (BAPC)

  •  Le Tan    
  •  Nguyen Le    



A new and selective spectrophotometric method for the determination of trace amounts of Pb(II) in aqueous environmental samples is reported. The interaction in solution between Pb(II) and Benzoic acid Azo Phenyl Calix[4]arene (BAPC) was studied. Upon reaction of PABC and Pb(II) a stable complex is formed. Under the conditions reported here the method furnishes reproducible results with basic media. The calixarene derivative shows strong binding ability to Pb2+ ion with formation of a 1:1 complex. Beer's law is obeyed in the range of 2.0´10-6 - 2.4´10-5 molL-1 of Pb2+. The apparent molar absorptivity (e) of 1-Pb2+ complex was 1.89 x104 Lmol-1cm-1 at 440 nm, and the detection limit is 1.4x10-6 mol L-1. The BAPC showed high sensitivity and selectivity for Pb2+. The method was used to determine the content of Pb(II) in synthetic and natural samples.

This work is licensed under a Creative Commons Attribution 4.0 License.
  • ISSN(Print): 1916-9698
  • ISSN(Online): 1916-9701
  • Started: 2009
  • Frequency: semiannual

Journal Metrics

h-index (December 2022): 32

i10-index (December 2022): 145

h5-index (December 2022): N/A

h5-median(December 2022): N/A

( The data was calculated based on Google Scholar Citations. Click Here to Learn More. )