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Table 2015.06A. Concentrations of standards and ISTD in calibration standard solutions, and
corresponding practical LOQ (PLOQ)
Na
Mg
P
K
Ca
Cr
Mn
Fe
Cu
Zn
Se
Mo
mg/L
mg/L
mg/L
mg/L
mg/L µg/L
mg/L
mg/L
mg/L
mg/L
µg/L
µg/L
Cal Blk
0
0
0
0
0
0
0
0
0
0
0
0
Cal Std 1
a
0.500
0.200
0.500
1.00
1.00
0.800 0.00500 0.0500 0.00500 0.0200 0.400 0.800
Cal Std 2
2.50
1.00
2.50
5.00
5.00
4.00
0.0250
0.250
0.0250
0.100
2.00
4.00
Cal Std 3
10.0
4.00
10.0
20.0
20.0
16.0
0.100
1.00
0.100
0.400
8.00
16.0
Cal Std 4
20.0
8.00
20.0
40.0
40.0
32.0
0.200
2.00
0.200
0.800
16.0
32.0
ISTD (at 50 µg/L) Ge
Ge
Ge
Ge
Ge
Ge
Ge
Ge
Ge
Ge
Te
Ge
PLOQ
0.25
0.10
0.25
0.50
0.50
0.40
0.0025
0.025
0.0025
0.010
0.20
0.40
a
Calibration standard.
Candidates for 2016 Method of the Year
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