石墨炉原子吸收
原子吸收光谱法
钨
检出限
分析化学(期刊)
标准物质
扫描电子显微镜
氢化物
质谱法
材料科学
石墨
铂金
化学
色谱法
冶金
量子力学
复合材料
催化作用
金属
生物化学
物理
出处
期刊:ACS omega
[American Chemical Society]
日期:2023-06-09
卷期号:8 (25): 22866-22875
被引量:8
标识
DOI:10.1021/acsomega.3c01856
摘要
A novel very sensitive and rapid analytical method was improved where gaseous lead formed was transported to and trapped on an externally heated platinum-coated tungsten-coil atom trap for in situ preconcentration. The analytical performance of the developed method with the graphite furnace atomic absorption spectrometry (GFAAS) method was compared. All critical parameters affecting the performance of both methods were optimized. The limit of quantitation (LOQ) was found as 11.0 ng L-1 and the precision was 2.3% in terms of percent relative standard deviation (RSD%). Characteristic concentration (Co) of the developed trap method was indicating a 32.5-fold enhancement in sensitivity compared to the GFAAS method. In order to investigate the surface morphology of the W-coil, scanning electron microscope-energy-dispersive X-ray (SEM-EDS) analyzes were performed. The accuracy of the trap method was tested by certified reference materials: NIST SRM 1640a (the elements in natural water) and DOLT:5 (dogfish liver). Interferences from other hydride-forming elements were investigated. Application of the trap method was demonstrated by the analysis of some drinking water and fish tissue samples. The t test was applied to drinking water samples, and the results indicated that there was no statistically significant error.
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