The results obtained for the accuracy of the method,
using pork sausage, bologna, and pepperoni, are shown in
Table 3. Samples were spiked with known quantities of
nitrate and nitrite and subsequently submitted to the
extraction procedures. The recoveries were calculated
according to Eq. 1 by comparing peak area ratios of the
samples spiked before extraction with peak area ratios of
the samples spiked after extraction and ranged from 96.8%
to 101.9% for the concentration levels used. Mean
recoveries were >96% for both nitrate and nitrite in all
three of these food matrices. Recoveries were