SPIFAN Nutrients ERP Book_9-29-15

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Linearity:

Table 1. Measurement of standard solutions to determine linearity for Ca, Cu, Fe, Mg, Mn, Na, P and Zn using six calibration standards.

Conc. mg/kg a

Recovery, % b

RSD, % c

Conc. mg/kg a

Recovery, % b

RSD, % c

Conc. mg/kg a

Recovery, % b

RSD, % c

Analyte

Analyte

Analyte

Ca

50

100.6 100.8 100.7

0.4 0.3 0.3 0.9 0.4 0.3 0.8 1.0 0.6 1.3 0.4 1.0 2.4 1.5 1.6 1.8 1.7 1.8

K

6

102.1 102.7 101.2

2.2 1.8 1.2 1.1 2.0 1.6 1.3 0.9 0.3 0.4 0.6 0.3 0.9 0.8 0.6 1.4 0.4 0.5

Na

2

101.8 101.5 100.8

1.8 1.1 0.8 1.2 0.8 1.4 0.8 1.6 1.4 1.4 1.0 1.2 1.7 1.1 0.8 1.3 1.3 0.6

100 200 500 750 975 0.02

30

10 50

150 300 750 975

98.3 99.9

99.1

100 250 325

98.7 99.6

100.7

100.4

99.6

101.1 101.4 101.3 100.0 100.5 101.8 101.1 101.9 101.6 97.8

Cu

96.7

Mg

10 20 40

100.9 100.8 100.4 100.0 100.3 101.0 100.8 100.7 98.4

P

5

0.1 0.5

101.3 100.9

25

125 250 500 650 0.1 0.5 2.5

1 2

97.9 99.7

100 150 195 0.02

2.6 0.5 2.5

100.8 101.8 101.8 101.6

Fe

Mn

Zn

0.1 0.5

12.5

25 50 65

98.2

1 2

97.5 99.9

5

98.1

100.6 101.2

10 13

100.7 100.9

2.6

100.8

a Expected concentration b Overall average for 3 independent days c Precision for 3 separate independent days

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