Assessment of Selected Heavy Metals Concentration Level of Drinking Water in Gazer Town and Selected Kebele, South Ari District, Southern Ethiopia

Table 1

Series of working standards for determination of trace metals in water sample.

Analytes	Calibration standard solutions (mg/L)
	S1	S2	S3	S4	S5	S6	S7	S8
Mn	0.5	1	2	4	6	8	10	12
Fe	0.5	1	2	4	6	8	10	12
Cr	0.5	1	2	4	6	8	10	12
Co	0.5	1	2	4	6	8	10	12
Zn	0.5	1	2	4	6	8	10	12
Ni	0.5	1	2	4	6	8	10	12
Cu	0.5	1	2	4	6	8	10	12
Pb	0.5	1	2	4	6	8	10	12
Cd	0.5	1	2	4	6	8	10	12