Research Article

Determination of Major and Trace Metals in Date Palm Fruit (Phoenix dactylifera) Samples Using Flame Atomic Absorption Spectrometry and Assessment of the Associated Public Health Risks

Table 2

Optimization of temperature for the digestion of 0.5 g of date palm fruit samples at a constant reagent volume and digestion time.

Reagent volume ratio (HNO3 : HClO4)Temperature (°C)Digestion time (hrs)Results (solution color)

3 : 11503 : 00Colorless with suspension
3 : 11803 : 00Colorless with suspension
3 : 12103 : 00Colorless and turbid
3 : 12403 : 00Colorless with suspension
3 : 12703 : 00Colorless and turbid
3 : 13003 : 00Clear and colorless