Fast and simple selenium speciation by solid phase extraction and laser-induced breakdown spectroscopy

Journal of Analytical Science and Technology

Table 1 Determination of Se (VI) in pH 7

Sample	Concentration of Se (VI) in sample solution (mg/kg)	Result by LIBS (mg/kg)	Recovery (%)
50 mg/kg Se (VI)^a	50.0	49.2 ± 2.7	98.5
100 mg/kg Se (VI)^b	100.1	101.9 ± 2.0	101.8

^a25 mg/kg Se (IV) + 25 mg/kg Se (VI) sample was prepared, and Se (IV) was oxidized to Se (VI)
^b50 mg/kg Se (IV) + 50 mg/kg Se (VI) sample was prepared, and Se (IV) was oxidized to Se (VI)