Comparison of Toxic Metal Concentrations in Antidiabetic Herbal Preparations (ADHPs) Available in Bangladesh Using AAS and XRF Analytical Tools

Table 2

Analytical results obtained on certified reference materials (μg/g).

Element	Certified value	Mean measured value (n = 3, intraday)	Recovery (%)	Accuracy (%)
Certified reference material	Analytical results
Pb	45	43.02	95.60	−4.40
Mn	91	85.28	93.71	−6.29
Cu	12	10.87	90.58	−9.42
Zn	25	25.8	103.20	3.20

Statistical analysis of data was performed using Microsoft Excel 2016 Data Analysis Tool-Pack. Pearson correlation coefficient was determined, and the regression model was developed for each set of toxic metals assessed by the instruments (AAS and XRF).