Trace Level Arsenic Quantification through Cloud Point Extraction: Application to Biological and Environmental Samples

Table 4

Determination of arsenic in biological samples.

Sample	Total As (ng)		As(V) added (ng)	Total As(V) found (ng)		Recovery (%)
	Proposed method	ICPAES method		Proposed method	ICPAES method	Proposed method	ICPAES method
Hair*	ND	ND	20	19.9±1.2	20.0±1.6	99.5	100
Nail*	ND	ND	10	9.2±1.9	9.8±1.1	96.2	98.0
Urine^†	ND	ND	20	19.6±1.2	20.3±1.2	98.0	101.5

𝑛=5; the values given here are average of five measurements.
ND: Not detected.
*Concentration in ng g⁻¹.
^†Concentration in ng mL⁻¹.