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Table 5 Statistical data of precision for CAA

From: Quantitative determination of cyanoacetic acid content in teriflunomide drug substance by ion chromatography using conductivity detector

System precision

Method precision

Intermediate precision

Injection No

CAA area

CAA (μg/g)

CAA (μg/g)

1

0.1993

502

484

2

0.1999

497

488

3

0.1977

504

478

4

0.1986

502

494

5

0.1985

502

485

6

0.1983

509

501

Mean

0.1987

503

488

SD

0.001

3.88

8.12

%RSD

0.5

0.8

1.7