盐酸超声-氟离子选择电极法测定复合肥中氟含量
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摘要
为快捷有效地测定复合肥中氟的含量,采用盐酸浸取过夜、盐酸超声、碱熔、纯水煮沸四种方法提取复合肥中的氟离子,用氟离子选择电极进行测定,全程加标回收;结果发现盐酸超声提取法测得值与碱熔提取法测定值非常接近,并且加标回收率为98.4%~104.2%,相对标准偏差为1.9%;则用盐酸超声提取法测定复合肥中的氟含量方法可靠,方便快速,能够满足复合肥中氟含量的测试要求。
In order to determinate fluorine in compound fertilizer effectively,four extraction methods including HCl leaching extraction overnight,ultrasonic solvent extraction,alkaline fusion digestion,pure water boiling digestion were studied.It can be included that similar results can be achieved through both ultrasonic solvent extractionby HCl and alkali fusion digestion method.The recovery is 98.4%~104.2%with 1.9% RSD.Therefore,ultrasonic solvent extraction method is reliable,convenient and fast,and it can meet the requirements of the determination of fluorine content in compound fertilizer.
In order to determinate fluorine in compound fertilizer effectively,four extraction methods including HCl leaching extraction overnight,ultrasonic solvent extraction,alkaline fusion digestion,pure water boiling digestion were studied.It can be included that similar results can be achieved through both ultrasonic solvent extractionby HCl and alkali fusion digestion method.The recovery is 98.4%~104.2%with 1.9% RSD.Therefore,ultrasonic solvent extraction method is reliable,convenient and fast,and it can meet the requirements of the determination of fluorine content in compound fertilizer.
引文
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[2]黄定明,周学东.氟化牙膏防龋作用研究新进展[J].现代口腔医学杂志,1999,13(4):298-299.
[3]李攻科,胡毛玲,阮贵华.样品前处理仪器与装置[M].北京:化学工业出版社,2007:2.
[4]景立新,刘熙君,王洪东,等.超声浸提离子选择电极法快速测定食品中微量氟[J].预防医学论坛,2008,14(8):740-743.
[5]陈桂琴,章效强,易永,等.碱熔-离子选择电极法测定土壤中氟的方法改进[J].现代测量与实验掌管理,2009(4):8-10.
[6]吴予明,张洪权,吴拥军,等.开放式灰化-酸溶-氟电极法测定蔬菜中微量氟[J].郑州大学学报:医学版,2003,38(1):105-107.
[7]袁威,张雪梅.离子选择电极测定铝矿中的氟[J].云南冶金,2004,33(3):49-50.
[8]万桂敏,范书浩,陈志,等.扩散-电极法在晶体氟检测中的应用[J].中同地方病防治杂志,1997,12(2):73-75.
[9]白凌,汪慧萍,陈凡.微波消解法测定水体中氟含量[J].冶金环境保护,2008(1):26-28.
[10]赵立达,鲁成银.茶叶中氟的检测方法[J].中国茶叶,2003(1):17-18.
[11]杨扬,杜晓明,金凤明,等.超声波萃取-离子选择电极法测定茶叶中的氟含量[J].江苏工业学报,2007,19(4):29-32.
[12]刘玮,刘春峰.碱熔-水蒸气蒸馏-离子色谱法测定锌精矿中的氟[J].中国无机分析化学,2014,4(2):14-17.
[13]周定友,张显晨,张正竹,等.水中氟化物测定过程中TISAB的对比分析与优化[J].环境化学,2010,29(4):759-763.