. 2019 Oct 10;14(10):e0223475. doi: 10.1371/journal.pone.0223475

Table 3. Azithromycine degradation constant rate k values at different pH levels.

“k (10⁻⁴)”
Time (hour)	pH 4	pH 5	pH 6	pH 7	pH 8	pH 9
1	1820 ± 15^e	1010 ± 5^e	430 ± 4^d	110 ± 2^e	260 ± 2^e	60 ± 0.6^e
3	763 ± 7^d	623 ± 2^cd	333 ± 2^c	80 ± 0.6^d	160 ± 2^d	13 ± 0.3^a
6	678 ± 5^c	578 ± 4^c	366 ± 3^cd	50 ± 0.4^c	93 ± 0.8^c	40 ± 0.2^d
12	422 ± 2^ab	344 ± 4^b	215 ± 2^b	15 ± 0.2^b	58 ± 0.6^b	30 ± 0.2^c
24	391 ± 2^a	221 ± 2^a	134 ± 2^a	7 ± 0.1^a	31 ± 0.4^a	20 ± 0.1^ab

Different letters indicate statistically significant differences at P < 0.05 according to a Tukey’s honest significant difference post hoc test. Values are mean ± standard errors of triplicate samples.