Full
Outline
To establish a method for the determination of iron tartrate in edible salt by ion chromatography.
The sample was dissolved in water, and excess sodium hydroxide was added to dissociate iron tartrate and release tartrate ions. After purification with Ag column to remove chloride ion interference, the tartrate was determined by ion chromatography using L-tartaric acid as standard substance, and the content of iron tartrate was calculated by molecular weight conversion.
L-tartaric acid showed good linearity in the mass concentration range of 0.1–1.5 mg/L with correlation coefficient r=0.9986. The detection results were measured in terms of iron tartrate. The limit of detection was 17 mg/kg and the limit of quantitation was 50 mg/kg. In 3 kinds of matrices including refined salt(iodized), refined salt (non-iodized) and low-sodium salt, the spiked recoveries ranged from 86.1% to 107.9% with relative standard deviations of 0.45%–2.71%.
This method is simple, sensitive and accurate, suitable for the determination of iron tartrate in edible salt and salt substitutes.
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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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