METHOD VALIDATION · ACCURACY

Accuracy Calculator

Enter spike recovery measurements across concentration levels. The calculator computes % recovery, SD, and RSD per level with overall summary — matching the Battery Method Validation walkthrough.

Analyte & Units

Analyte Unit

C_spiked = ppm

PASS

Acceptance Criteria

Min Rec. % Max Rec. % Max RSD %

Measured Values (ppm)

n = 3

#C_found

Individual Recoveries

#	C_found (ppm)	Recovery %
1	0.480	96.0%
2	0.510	102.0%
3	0.490	98.0%

n = 3

Mean = 98.67% (80–120%) ✓

SD = 3.06%

RSD = 3.10% (≤ 10%) ✓

C_spiked = ppm

PASS

Acceptance Criteria

Min Rec. % Max Rec. % Max RSD %

Measured Values (ppm)

n = 3

#C_found

Individual Recoveries

#	C_found (ppm)	Recovery %
1	9.940	99.4%
2	10.080	100.8%
3	10.120	101.2%

n = 3

Mean = 100.47% (90–110%) ✓

SD = 0.95%

RSD = 0.94% (≤ 5%) ✓

C_spiked = ppm

PASS

Acceptance Criteria

Min Rec. % Max Rec. % Max RSD %

Measured Values (ppm)

n = 3

#C_found

Individual Recoveries

#	C_found (ppm)	Recovery %
1	19.870	99.4%
2	20.140	100.7%
3	20.060	100.3%

n = 3

Mean = 100.12% (90–110%) ✓

SD = 0.69%

RSD = 0.69% (≤ 5%) ✓

Overall Summary — Fe (m/z 56)

PASS

Total Measurements

n = 9

Grand Mean Recovery

99.75%

Overall RSD

1.84%

Overall SD = 1.833%

Levels evaluated: 3 / 3

All spike levels pass recovery and RSD criteria. Grand mean = 99.75%, overall RSD = 1.84%. Method demonstrates adequate accuracy for Fe (m/z 56).

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