Analytical Sciences

Novel Method for the Fast Preconcentration and Monitoring of a ppt Level of Lead and Copper with a Modified Hexagonal Mesoporous Silica Compound and Inductively Coupled Plasma Atomic Emission Spectrometry

Mohammad Reza GANJALI,* Leila HAJIAGHA BABAEI,* Alireza BADIEI,* Ghodsi MOHAMMADI ZIARANI,** and Aliakbar TARLANI*

*Department of Chemistry, Tehran University, Tehran, Iran
**Department of Chemistry, Alzahra University, Tehran, Iran

A novel method for the rapid extraction and determination of a ppt level of Pb²⁺ and Cu²⁺ ions using partial silylated MCM-41 modified by a new salophen and inductively coupled plasma atomic emission spectrometry (ICP-AES) is introduced. The preconcentration factor of the method is 500, and the detection limits of Pb²⁺and Cu²⁺ are 335 and 34 ng L^-1, respectively. The time and efficiency of extraction, the pH and flow rate, the type and minimum amount of acid for stripping of Pb²⁺ and Cu²⁺ from modified MCM-41 and the break-through volume were investigated. The maximum capacity of 4 mg of silylated MCM-41 modified by salophen used was found to be 150 ± 4 and 117 ± 3 µg of Pb²⁺ and Cu²⁺, respectively.

J-STAGE: View this article in J-STAGE