研究目的
To develop a simple, sensitive, and convenient method for the detection of lead using resonance Rayleigh scattering (RRS) and resonance non-linear scattering (RNLS) techniques.
研究成果
A highly convenient, rapid, and accurate method for the determination of trace amounts of lead was developed using RRS and RNLS techniques. The method demonstrated good selectivity, high sensitivity, and easy operation, making it suitable for monitoring lead in water samples.
研究不足
The method requires a low ionic strength condition for optimal performance. The presence of high concentrations of NaCl decreases the RRS intensity. The method's sensitivity to Pb(II) is affected by the pH and the concentrations of AR and CPB.
1：Experimental Design and Method Selection:
The study utilized resonance Rayleigh scattering (RRS) and resonance non-linear scattering (RNLS) methods, including second-order scattering (SOS) and frequency doubling scattering (FDS), for the determination of lead.
2：Sample Selection and Data Sources:
Standard solutions of lead, Alizarin red (AR), and cetylpyridinium bromide (CPB) were prepared. The reaction medium was adjusted to pH
3：6 using NH3·H2O solution. List of Experimental Equipment and Materials:
A Hitachi F-7000 fluorescence spectrophotometer was used for RRS and scattering intensity measurements. A UV-8500 spectrophotometer recorded absorption spectra. An S-2F digital pH meter adjusted pH.
4：Experimental Procedures and Operational Workflow:
The ternary ion-association complex formation was studied by mixing AR, CPB, and Pb(II) in NH3·H2O medium, followed by RRS, SOS, and FDS spectra recording.
5：Data Analysis Methods:
The scattering intensities were analyzed to determine the linear range, detection limits, and the effect of various factors on the system.
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