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. 2011 May 29;6:37–44. doi: 10.4137/ACI.S6969

Figure 6.

Figure 6

Calibration curve of nitrite concentration in ppm versus absorbance. Successive amounts of nitrite solution were added to 3 ml of 0.1 M HCl and 1 ml of 10−3 M ABTS. The solution was made up to 10.0 ml by deionized water.