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Recovery, Repeatability, and Recovery for All
Analytes
Ranges
(ppm)
10 – 50 51 ‐ 500 501.–
4,000
4,001 –
20,000 >20,000
Recovery
(%)
80 ‐110 90‐107 95‐105 97‐103 98‐102
RSD
r
(%)
≤ 7
5
4
2
2
RSD
R
(%)
≤ 10
8
6
3
3
SMPR Key Points
•
Complex of dietary supplement matrix;
‐need specialized extraction and sample preparation
•
Wide range of contents of analytes;
‐need precise analytical techniques
F l
f
l t T t hi (8 ) M th l
•
our c asses o ana y es‐ ea ca ec ns , e y
xanthines (3), Theaflavins (4), and Theanine (1).
‐need quantitative standards