Journal of Chemistry / 2013 / Article / Tab 1

Research Article

A Simple HPLC-DAD Method for the Analysis of Melamine in Protein Supplements: Validation Using the Accuracy Profiles

Table 1

Accuracy profile validation results for melamine in dietary supplements.

Linearity
( )

Range ( g mL−1)0.05–3.0
Slope0.9659
Intercept 0.0081
0.9999

Trueness (mg kg−1)Relative bias (%)Recovery (%)
( )

0.05 98.6
1.5 99.4
3.0 98.3

Precision (mg kg−1)Repeatability (RSD %)Intermediate precision (RSD %)
( )

0.05 2.1 2.2
1.5 2.3 2.7
3.0 2.0 2.3

Accuracy (mg kg−1) -expectation tolerance limits (%)
( )

0.05
1.5
3.0

Uncertainty (mg kg−1)Relative expanded uncertainty (%)
( )

0.054.7
1.55.8
3.04.9

Limits of quantitation (LOQ)

Lower LOQ Upper LOQ
0.053.0

: number of series; : number of amount levels; : number of replicates.
RSD: relative standard deviation.

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