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Trace elements analysis for groundwater and rock samples

TO Tobiloba Onipe
JE Joshua N. Edokpayi
JO John O. Odiyo
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Major cations in the acidified groundwater water samples were analyzed using Inductively coupled plasma optical emission spectrophotometer (ICP-OES) while Inductively coupled plasma mass spectrophotometer (ICP-MS) were used for the analysis of trace metals. Similarly, Trace and major metals in the soil and rock samples were analyzed using the same analytical instruments outlined above after microwave digestion. The procedure reported by Pais and Jones47 for soil and rock sample digestion were adhered to. Briefly: The soil/rock samples were digested using a microwave digestion system (SR ISO 11,466: 1999). Approximately 1.0 g of pre-treated samples were digested with 9 mL HNO3 and 1 mL H2O2. The solutions were allowed to stay overnight at room temperature and then, placed in the microwave for 30 min, followed by cooling. The solutions were diluted to 50 mL with distilled water.

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