Electrochemical determination of nitrite in meat samples (each sample was tested for three times)a.
| Samples | Ion chromatography | Electrochemical method | Electrochemical method (mean ± SD) | RSD/% | ||
|---|---|---|---|---|---|---|
| N 1 | N 2 | N 3 | ||||
| Meat 1 | 28.08 | 23.1 | 26.29 | 27.39 | 25.59 ± 2.23 | 8.71 |
| Meat 2 | 31.3 | 31.43 | 32.98 | 35.01 | 33.14 ± 1.80 | 5.43 |
| Meat 3 | 46.04 | 41.87 | 44.58 | 47.33 | 44.59 ± 2.73 | 6.12 |
| Meat 4 | 66.4 | 66.45 | 71.39 | 73.38 | 70.41 ± 3.57 | 5.07 |
a
Note: N1, N2 and N3 represents parallel number of measurements. N1 corresponds the value obtained by first detection. N2 corresponds the value obtained by second detection. N3 corresponds the value obtained by third detection.