344 / 471
Figure 2014.09B. Number of blank, fortified, incurred, and aged samples for the collaborative study. Nos.
03 and 08 are unknown blank samples. Fortified samples are designed per principle of blinds duplication.
Table 2014.09H. Recommended maximum permitted tolerances for relative ion intensities using a
range of mass spectrometric techniques
Relative intensity
(% of base peak), %
GC-MS (relative), %
GC-MS/MS, LC-MS/MS (relative),
%
>50
±10
±20
>20-50
±15
±25
>10-20
±20
±30
≤10
±50
±50
Blind duplication design
Green tea
Sample
No.01
Fortified
solution
No.01
Oolong tea
Fortified Samples
Incurred Samples
Sample
No.0 2
Fortified
solution
No. 02
*Sample
No. 03
Sample
No. 04
Sample
No. 05
Sample
No. 06
Fortified
solution
No. 06
Sample
No. 07
Fortified
solution
No. 07
*Sample
No. 08
Fortified Samples
Aged Samples
Sample
No. 09
Sample
No. 10
Candidates for 2016 Method of the Year
284