Skip to main content
. 2012 Apr 16;5(3):379–387. doi: 10.1111/j.1751-7915.2011.00320.x

Figure 4.

Figure 4

Abiotic NO‐N (ng l−1) production from (A) 5 mg NO2‐N l−1 solution and (B) feed without cysteine incubated with or without 20 mmol Na2S l−1 at pH 5, 7 or 9 for 24 h at 37°C. ND indicates that the values were below the detection limit.