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To establish an ion chromatography method for the determination of xylitol, erythritol, sorbitol and maltitol in infant formula.
Dionex CarboPacTM MA1 sugar column guard column (4 mm×50 mm) and Dionex CarboPacTM MA1 sugar analysis column (4 mm×250 mm) were used as chromatographic columns, 480mmol/L sodium hydroxide eluent was used for isocratic elution, the flow rate was 0.45mL/min, the injection volume was 10μL, the column temperature was 30℃, and the electrochemical detector was detected.
The mass concentration showed a good linear relationship with its peak area in the range of 0.2~20 μg/mL (r2≥0.99969) , the detection limit was between 0.01~0.20 μg/mL, the average recovery rate was 91.8%~99.1%, and the relative standard deviation (RSD) was in the range of 0.9%~2.9%.
This method was simple to operate, had high sensitivity and good stability, and could provide a reference for the quality control of infant formula.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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