Heavy metals
Wave length
(nm)
Estimated detection limit
(
㎍
/L
)
Alternate wave length
(nm)
Calibration concentration (
mg/L
)
Upper Limit concentration
(mg/L)
Lead (Pb
2+
)
220.35
40
217
10.0
100
Copper (Cu
2+
)
324.75
6
219.96
1.0
50
Cadmium (Cd
2+
)
226.50
4
214.44
2.0
50
Chromium (Cr
6+
)
267.72
7
206.15
5.0
50
Mercury (Hg
2+
253.70
2
184.91
1.0
50
Arsenic (As
2+
)
193.70
50
189.04
10.0
100
Table 2:
Operating conditions of inductively coupled plasma - atomic emission spectrometer (ICP-AES).
