凉果中二氧化硫的快速高效检测方法探究
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摘要
本文利用凯氏定氮仪对凉果及其制品进行蒸馏处理,并利用电位滴定仪中的电位突跃替代淀粉指示剂对滴定终点进行判定,建立了自动电位滴定仪滴定二氧化硫含量的快速高效检测方法。
The Kelvin nitrogen analyzer was used to completely distill out the sulfur dioxide in the fruit, and then the potentiometric titration method was used to replace the starch indicator to determine the end point of the titration. A fast and efficient method for titrating the sulfur dioxide content by the automatic potentiometric titrator was established. The results showed that linear relationships of sulfur dioxide were found in the range of 5.0 ～ 500.0 mg/L, and the correlation coefficient was 0.9991. The limits of detection and the limits of quantitation were 1.5 mg/kg and 5.0 mg/kg, respectively. The recoveries ranged from 93.1% to 101.1%, and the relative standard deviations ranged from 0.35% to 1.76%. The method has high recovery rate, good precision, simple and efficient operation, and is suitable for the automatic detection of batch samples.
The Kelvin nitrogen analyzer was used to completely distill out the sulfur dioxide in the fruit, and then the potentiometric titration method was used to replace the starch indicator to determine the end point of the titration. A fast and efficient method for titrating the sulfur dioxide content by the automatic potentiometric titrator was established. The results showed that linear relationships of sulfur dioxide were found in the range of 5.0 ～ 500.0 mg/L, and the correlation coefficient was 0.9991. The limits of detection and the limits of quantitation were 1.5 mg/kg and 5.0 mg/kg, respectively. The recoveries ranged from 93.1% to 101.1%, and the relative standard deviations ranged from 0.35% to 1.76%. The method has high recovery rate, good precision, simple and efficient operation, and is suitable for the automatic detection of batch samples.
引文
[1]陆阳.利用凯氏蒸馏-自动电位滴定仪快速测定食用菌中二氧化硫含量[J].食品安全导刊,2017(28):70-71.
[2]毛琏,王娣,张兰天,等.凯氏蒸馏-电子滴定器碘滴定法测定食品中的二氧化硫[J].中国食品卫生杂志,2016(5):605-609.
[3]吴婕,蔡宇春,李镇坤.利用凯氏定氮仪测定龟苓膏粉中二氧化硫的残留量[J].轻工科技,2016(4):104-105.
[4]陈建芳.利用凯氏定氮仪快速测定葡萄酒中二氧化硫[J].食品安全质量检测学报,2015(6):2386-2390.
[5]白艳艳,潘秋仁,王文伟.自动凯氏定氮仪测定一次性筷子中二氧化硫含量[J].中国卫生检验杂志,2012(12):2868-2869.
[6]黄永辉.GC-MS法同时测定塑料玩具中22种邻苯二甲酸酯增塑剂[J].塑料科技,2011(1):94-98.
[7]谢艳云,张明明,邓颖妍,等.凯氏定氮-电位滴定仪联合快速检测果脯中的二氧化硫[J].食品科学,2010(14):225-228.
[8]GB 5009.34-2016.食品安全国家标准食品中二氧化硫的测定[S].
[9]靳雪雪,袁翔宇,邢常瑞,等.新型重金属快速检测方法研究[J].粮食科技与经济,2018(12):47-51.
[10]赵小旭,柳家鹏,柴艳兵,等.胶体金免疫层析法快速检测乳制品中重金属离子铅[J].粮食科技与经济,2018(3):51-54.
[2]毛琏,王娣,张兰天,等.凯氏蒸馏-电子滴定器碘滴定法测定食品中的二氧化硫[J].中国食品卫生杂志,2016(5):605-609.
[3]吴婕,蔡宇春,李镇坤.利用凯氏定氮仪测定龟苓膏粉中二氧化硫的残留量[J].轻工科技,2016(4):104-105.
[4]陈建芳.利用凯氏定氮仪快速测定葡萄酒中二氧化硫[J].食品安全质量检测学报,2015(6):2386-2390.
[5]白艳艳,潘秋仁,王文伟.自动凯氏定氮仪测定一次性筷子中二氧化硫含量[J].中国卫生检验杂志,2012(12):2868-2869.
[6]黄永辉.GC-MS法同时测定塑料玩具中22种邻苯二甲酸酯增塑剂[J].塑料科技,2011(1):94-98.
[7]谢艳云,张明明,邓颖妍,等.凯氏定氮-电位滴定仪联合快速检测果脯中的二氧化硫[J].食品科学,2010(14):225-228.
[8]GB 5009.34-2016.食品安全国家标准食品中二氧化硫的测定[S].
[9]靳雪雪,袁翔宇,邢常瑞,等.新型重金属快速检测方法研究[J].粮食科技与经济,2018(12):47-51.
[10]赵小旭,柳家鹏,柴艳兵,等.胶体金免疫层析法快速检测乳制品中重金属离子铅[J].粮食科技与经济,2018(3):51-54.