Table 4.
Concentration of preservative in food samples (mg/kg) analysed by HPLC–DAD
| Commodity | Tested Sample | Dehydroacetic acid | Benzoic acid | Sorbic acid | Ethyl p-hydroxybenzoate | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Detected sample | Range (mg/kg) | Detected mean ± SD (mg/kg) | Detected sample | Range (mg/kg) | Detected mean ± SD (mg/kg) | Detected sample | Range (mg/kg) | Detected mean ± SD (mg/kg) | Detected sample | Range (mg/kg) | Detected mean ± SD (mg/kg) | ||
| Processed Cheese | 15 | ND | ND | ND | ND | ND | ND | 2 | ND-1238 | 837 ± 401 | ND | ND | ND |
| Soy sauce | 22 | ND | ND | ND | ND | ND | ND | ND | ND | ND | 7 | ND-244 | 165 ± 44.0 |
| Dried fish | 15 | ND | ND | ND | ND | ND | ND | 7 | ND-876 | 494 ± 244 | ND | ND | ND |
| Dried and stored meat | 10 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Red pepper paste | 15 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Fruit juice | 15 | ND | ND | ND | 1 | ND-186 | 186 ± 0 | ND | ND | ND | ND | ND | ND |
| Sugar processed products | 20 | ND | ND | ND | ND | ND | ND | 11 | ND-801 | 221 ± 208 | ND | ND | ND |
| Soybean paste | 15 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Peanut butter | 12 | ND | ND | ND | ND | ND | ND | 2 | ND-107 | 98.2 ± 9.30 | ND | ND | ND |
| Margarine | 10 | 2 | ND-62.7 | 47.3 ± 15.4 | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Mayonnaise | 12 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Imitation Cheese | 10 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Butter | 15 | 4 | ND-144 | 108 ± 21.2 | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Bacon | 10 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Bread | 20 | ND | ND | ND | ND | ND | ND | 2 | ND-155 | 116 ± 38.6 | ND | ND | ND |
| Sauce | 36 | ND | ND | ND | ND | ND | ND | 5 | ND-402 | 146 ± 142 | 23 | ND-200 | 116 ± 47.1 |
| Vinegar | 20 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Fish cake | 20 | ND | ND | ND | ND | ND | ND | 15 | ND-1363 | 757 ± 260 | ND | ND | ND |
| Natural cheese | 15 | ND | ND | ND | ND | ND | ND | 1 | ND-2532 | 2532 ± 0 | ND | ND | ND |
| Jam | 20 | ND | ND | ND | ND | ND | ND | 1 | ND-256 | 252 ± 0 | ND | ND | ND |
| Pickles | 26 | ND | ND | ND | 2 | ND-326 | 292 ± 33.9 | 19 | ND-791 | 400 ± 169 | 3 | ND-38.4 | 35.2 ± 2.61 |
| Salted fish | 20 | ND | ND | ND | ND | ND | ND | 4 | ND-260 | 180 ± 61.0 | ND | ND | ND |
| Stewed food products | 15 | ND | ND | ND | ND | ND | ND | 1 | ND-7.00 | 7.00 ± 0 | ND | ND | ND |
| Alcohol | 20 | ND | ND | ND | ND | ND | ND | 7 | ND-123 | 95.9 ± 37.2 | ND | ND | ND |
| Soft drink | 22 | ND | ND | ND | 12 | ND-336 | 194 ± 66.7 | 4 | ND-71.9 | 63.3 ± 7.36 | ND | ND | ND |
| Tomato ketchup | 20 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Spice products | 21 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Mixed drink | 20 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Mixed paste | 20 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Red ginseng drink | 10 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Total | 521 | 4 | ND-144 | 47.3 ± 21.2 | 15 | ND-336 | 186 ± 66.7 | 81 | ND-1,238 | 7.00 ± 401 | 33 | ND-244 | 35.2 ± 47.1 |
SD standard deviation; ND not detected