Discussion on Matrix Modifiers in the Determination of Heavy Metal Ions in Environmental Water Samples by Graphite Furnace Atomic Absorption Spectrometry

Abstract

Adding matrix modifier is a common and efficient method to eliminate chemical interferences in graphite furnace atomic absorption spectrometry (GFAAS). The students' understanding of the choice and mechanism of matrix modifier is only at the textbook level. In the light of this, the multiple teaching modes are adopted to make students' learning activities changed from passive to active. Through literature investigation, group discussion, induction and summary and subsequent student experiments, the matrix modifier for the determination of heavy metal ions in environmental water samples by GFAAS is discussed in depth.

Recent Progress in Synthesis, Mechanism and Applications of Zinc-Based Metal-Organic Frameworks for Fluorescent Sensing

“…Commonly used techniques for the trace detection of contaminants, including high-performance liquid chromatography (HPLC) [10], atomic absorption spectrophotometry (AAS) [11], inductively coupled plasma atomic emission spectrometry (ICP-AES) [12] and inductively coupled plasma mass spectrometry (ICP-MS) [13], are sensitive and accurate. However, they are severely limited by expensive instruments, high maintenance costs, long detection time, complex sample pretreatment and large amount of detection sample [14].…”