SPDS Meeting Book

Recovery, Repeatability, and Recovery for All Analytes

Ranges  (ppm)

4,001 – 20,000 >20,000

10 – 50 51 ‐ 500 501.– 4,000

Recovery  (%)

80 ‐110 90‐107 95‐105 97‐103 98‐102

(%)

≤ 7

5

4

2

2

RSD r 

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 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 f