Table 5.
Potentiometric assessment of TAC with 2,6-DCPIP-based sensors in commercial, fresh juices and pharmaceutical drugs.
| Sample | TAC, µg/mL * (AA) | |||
|---|---|---|---|---|
| DPPH Standard method [45] | Sensor I/DOP | Sensor II/DOP | ||
| 1-Vitacid a (Chemical Industries Development (CID), Egypt) | 1005.1 ± 3.8 | 980.7 ± 3.2 | 1010.1 ± 7.7 | |
| 2-C-Vit b (Universal Pharmaceutical Industries (Unipharma), Egypt) | 1010.2 ± 11.2 | 1050.3 ± 2.7 | 1062.6 ± 5.5 | |
| 3-Canned orange juices | 1-Juhayna Pure (El Dawleya Co. for Modern Food Industries, Egypt) (100%) | 513.6 ± 10.1 | 492.5 ± 6.6 | 483.8 ± 3.7 |
| 2- Juhayna (El Dawleya Co. for Modern Food Industries, Egypt) (˂25%) | 281.8 ± 5.4 | 255.2 ± 3.2 | 247.3 ± 7.1 | |
| 3-Domty (Arabian Food Industries, Egypt) (˂25%) | 424.5 ± 8.3 | 410.3 ± 5.9 | 371.7 ± 6.3 | |
| 4-Faragello Gold (The Egyptian Food Company, Egypt) (100%) | 157.7 ± 7.2 | 142.6 ± 7.1 | 139.4 ± 5.2 | |
| 5- Faragello (The Egyptian Food Company, Egypt) (10%) | 37.1 ± 1.8 | 28.2 ± 2.2 | 30.4 ± 2.1 | |
| 6- Easymoozoo (The Egyptian Food Company, Egypt) (10%) | 48.9 ± 5.6 | 36.4 ± 1.4 | 41.1 ± 1.9 | |
| 7- Prego (Brego for Food Industries, Egypt) (25%) | 104.9 ± 6.3 | 97.1 ± 1.2 | 91.2 ± 3.7 | |
| 8- Lipton iced tea (Pepsi Bugshan Investment, a SAE Unilever trademark) orange juice? | 95.9 ± 8.1 | 83.5 ± 2.4 | 81.4 ± 5.6 | |
| 4-Fresh Lemon juice | 378.6 ± 9.5 | 350.2 ± 4.2 | 361.3 ± 6.2 | |
| 5- Fresh Orange juice | 77.6 ± 2.4 | 66.1 ± 1.1 | 61.3 ± 3.7 | |
a labeled 1 g/tablet, b labeled 100 mg/1 mL, * Average of five measurements.