An effective analytical system based on an ultraviolet atomizer for trace cadmium determination using atomic fluorescence spectrometry

作者：Yuan, Xin; Yang, Li; Liu, Siyan; Yang, Haiyan; Tang, Yuyi; Huang, Ke^*; Zhang, Mei^*

来源：Analytical Methods, 2018, 10(39): 4821-4826.

DOI：10.1039/c8ay01469h

• LIQUID-LIQUID MICROEXTRACTION
• CHEMICAL-VAPOR GENERATION
• SOLID-PHASE EXTRACTION
• ABSORPTION-SPECTROMETRY
• WATER SAMPLES
• EMISSION-SPECTROMETRY
• PLASMA
• MERCURY
• RICE
• SPECIATION

A novel ultraviolet (UV) atomization atomic fluorescence spectrometry (UV-AFS) system was developed for the quantitative analysis of trace cadmium ions (Cd) without preconcentration. Cd2+ can transform into Cd-0 and Cd hydride (CdH2) gas vapor after hydride generation (HG) with KBH4. With the help of a simple, low power and low temperature UV atomizer, CdH2 can be converted to Cd-0 and thus the total Cd was detected. Due to the high atomization efficiency and low carrier gas dilution of the UV atomizer, the analytical system provides high sensitivity with a limit of detection (LOD) of 0.006 ng mL(-1), which was comparable to those obtained by preconcentration methods. The relative standard deviation (RSD) (n = 11) was better than 2.1% at a concentration of 0.5 ng mL(-1). Its application was demonstrated by analyzing Certified Reference Materials and food samples for ultra-trace detection of Cd2+.

• 出版日期2018-10-21
• 单位四川师范大学; 成都中医药大学