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Analysis of Chlorate in Chemical Leavening Agents Used for Bakery Products by Liquid Chromatography–Mass Spectrometry
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2022-11-15 , DOI: 10.1021/acs.jafc.2c04627
Sabrina Gensberger-Reigl 1 , Vera L Rodrigues Guimarães Abreu 1 , Monika Pischetsrieder 1
Affiliation  

Chlorate is a food contaminant that is mainly attributed to the use of chlorinated water and disinfectants. The present study investigated if chlorate could also occur as a process contaminant in chemical leavening agents for baking products. Thus, a sensitive and rapid ultrahigh-performance liquid chromatography–tandem mass spectrometry method was developed and validated. Chlorate was quantified using an isotopically labeled internal standard after complete degassing of carbonate-based products. The limit of detection/limit of quantification was 0.02 and 0.1 mg/kg, respectively, with recovery rates between 97.0 and 101.2% (concentration levels: 0.3, 1.4, or 5.0 mg/kg). Samples of baking powder, sodium bicarbonate, ammonium bicarbonate, and potassium carbonate were analyzed. Chlorate was detected in all samples of baking powder in concentrations of 0.23–1.87 mg/kg. Potassium carbonate contained the highest chlorate levels, with a maximum of 60.9 mg/kg. These results indicate that baking powder and, particularly, potassium carbonate can be relevant sources of chlorate in food.

中文翻译:

通过液相色谱-质谱法分析用于烘焙产品的化学膨松剂中的氯酸盐

氯酸盐是一种食品污染物,主要归因于使用氯化水和消毒剂。本研究调查了氯酸盐是否也可能作为烘焙产品的化学发酵剂中的工艺污染物出现。因此,开发并验证了一种灵敏、快速的超高效液相色谱-串联质谱法。在碳酸盐基产品完全脱气后,使用同位素标记的内标对氯酸盐进行定量。检测限/定量限分别为 0.02 和 0.1 mg/kg,回收率在 97.0% 和 101.2% 之间(浓度水平:0.3、1.4 或 5.0 mg/kg)。对泡打粉、碳酸氢钠、碳酸氢铵和碳酸钾样品进行了分析。在所有发酵粉样品中检测到氯酸盐,浓度为 0.23–1.87 mg/kg。碳酸钾中的氯酸盐含量最高,最高为 60.9 mg/kg。这些结果表明发酵粉,尤其是碳酸钾可能是食品中氯酸盐的相关来源。
更新日期:2022-11-15
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