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. 2021 May 20;1176:122768. doi: 10.1016/j.jchromb.2021.122768

Table 4.

The interference study results of favipiravir (bias%).

Positive mode
Concentration(μg/mL) D1
4.1
3.9
3.5
D2
4.2
4.3
3.9
D3
4.8
3.8
4.2
D4
6.5
5.7
4.9
D5
0.062 (bias%) 7.8
25 (bias%) 5.9
50 (bias%) 5.1
Concentration(μg/mL) Negative mode
0.048 (bias%) D1
4.3
3.7
3.6
D2
4.5
4.4
4.4
D3
7.1
4.9
3.8
D4
7.4
4.5
4.8
D5
7.9
25 (bias%) 5.8
50 (bias%) 5.1

D1: 0%, D2: 25%, D3: 50%, D4: 75%, D5:100% interferant (allopurinol) level.