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机构地区:[1]郑州科技学院食品科学系,郑州450064 [2]河南农业大学食品科学技术学院,郑州450002
出 处:《中国调味品》2014年第1期90-93,共4页China Condiment
基 金:河南省重点学科建设基金项目(10466-X-082301)
摘 要:为建立一种简便、快速测定调味品中微量氟的方法。以生姜为样品,采用超声波辅助萃取,以氟离子选择性电极浓度直读法进行测定。结果表明,氟离子测定的最佳条件;料液比1.00:50.00,超声温度25℃,超声时间3min。所用氟离子电极斜率的转换系数为92.862%。干基样品氟含量的测定均值为37.540~41.404μg/g,相对标准偏差(RSD)为3.3%~5.5%(n=9),回收率为92.8%~97.2%。利用离子选择性电极,结合浓度直读法与超声波浸提技术快速测定生姜中微量氟的方法简便、直观,无需作图,所用仪器便于携带,测定成本低,适用于现场快速测定。Taking ginger (Gingiber officinale Roscoe) as sample, using ultrasonic assisted extraction and fluoride ion selective electrode with direct-reading concentration method for simple and rapid detecting trace fluorine in condiment. The results show that the best conditions for determination of fluoride ions are: the ratio of material to liquid is 1.00 : 50.00, the ultrasonic temperature is 25 ℃ and the ultrasonic time is 3 min. The slope conversion coefficient of fluoride ion selective electrode is 92. 862%. The mean content of fluorine in samples is 37. 540-41. 404μg/g and the relative standard deviation (RSD) is 3.3%-5.5 % (n=9), the recovery rate is 92.8%-97.2%. The methods of ion selective electrode and direct-reading concentration with ultrasonic extraction technology for rapid determination of trace fluorine in ginger are simple, intuitive, without mapping; the instrument is portable, with low cost, being suitable for on-site rapid determination.
分 类 号:TS207.3[轻工技术与工程—食品科学]
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