Alternatively, and confirming that the described pink blushing could be attributed to the oxidation of the Griess reagents, significant improvements in stability were observed when the PADs were dried and stored under nitrogen (Fig. 3, trace C)
Alternatively, and confirming that thedescribed pink blushing could be attributed to the oxidation ofthe Griess reagents, significant improvements in stability wereobserved when the PADs were dried and stored under nitrogen(Fig. 3, trace C)