调味盐碘离子测定中碱保护剂的选择
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摘要
目的探索适合调味盐碘含量测定的碱保护剂。方法选取低钠菇盐为样品,在样品前处理过程中分别用NaOH、NaHCO_3、Na_2CO_3作为碱保护剂,采用国家标准氧化还原法,对盐产品的碘含量进行检测。结果最佳碱保护剂为NaHCO_3,溶液最佳pH值为4,相对标准偏差2.3%～4.2%,回收率98.9%～100.5%,能够满足调味盐碘测定精密度和准确度要求。结论 NaOH作为碱保护剂对瓷坩埚造成强烈腐蚀性,降低坩埚使用寿命; Na_2CO_3作为碱保护剂,反应剧烈,结果误差较大; NaHCO_3为碱保护剂时,腐蚀刺激性低,安全环保,故推荐NaHCO_3作为调味盐碘离子测定的碱保护剂。
Objective To explore the suitable alkali protectant for the determination of iodine content in seasoning salt. Methods Low sodium mushroom salt was selected as sample, and NaOH, NaHCO_3 and Na_2CO_3 were used as alkali protectant in the sample pretreatment process. The iodine content of salt products was detected by the national standard redox method. Results The best alkali protectant was NaHCO_3. The best pH value of the solution was 4, the relative standard deviations were 2.3%-4.2% and the recovery rates were 98.9%-100.5%, which could meet the precision and accuracy requirements of the flavoring salt iodine. Conclusion NaOH as an alkali protector causes strong corrosiveness to porcelain crucible and reduces the life of crucible. Na_2CO_3 as an alkali protector, the reaction is intense, the result error is large. NaHCO_3 as an alkali protector has low corrosion irritation and safety. Therefore, NaHCO_3 is recommended as alkali protector for the determination of salt iodide ion.
Objective To explore the suitable alkali protectant for the determination of iodine content in seasoning salt. Methods Low sodium mushroom salt was selected as sample, and NaOH, NaHCO_3 and Na_2CO_3 were used as alkali protectant in the sample pretreatment process. The iodine content of salt products was detected by the national standard redox method. Results The best alkali protectant was NaHCO_3. The best pH value of the solution was 4, the relative standard deviations were 2.3%-4.2% and the recovery rates were 98.9%-100.5%, which could meet the precision and accuracy requirements of the flavoring salt iodine. Conclusion NaOH as an alkali protector causes strong corrosiveness to porcelain crucible and reduces the life of crucible. Na_2CO_3 as an alkali protector, the reaction is intense, the result error is large. NaHCO_3 as an alkali protector has low corrosion irritation and safety. Therefore, NaHCO_3 is recommended as alkali protector for the determination of salt iodide ion.
引文
[1]郭玉熹,黄文丽.微量元素碘与人体健康的关系[J].国外医学-医学地理分册),2014,35-1):64-68.Guo YX,Huang WL.The association between iodine and human health[J].Foreign Med Sci-Med Geogr),2014,35-1):64-68.
[2]李军.碘缺乏病及其防制对策分析[J].临床医药文献电子杂志,2017,-78):15326-15326.Li J.Analysis of iodine deficiency disease and its countermeasures[J].JClin Med Literat,2017,-78):15326-15326.
[3]GB/T 13025.7-2012制盐工业通用试验方法碘的测定[S].GB/T 13025.7-2012 General test method in salt industry-Determination of iodine[S].
[4]赵卫京.应用自动电位滴定法测定食用盐中的碘离子[J].微量元素与健康研究,2016,33-4):56-59.Zhao WJ.Determination of iodine ions in edible salt by automatic potentiometric titration[J].Stud Trace Element Health,2016,33-4):56-59.
[5]王晓玲,张萍,陈燕.盐酸氯丙嗪显色-分光光度法快速测定食盐中的碘含量[J].中国无机分析化学,2015,5-3):74-76.Wang XL,Zhang P,Chen Y.Determination of iodine in salt based on color reaction between chlorpromazine and indate root by spectrophotometric method[J].Chin J Inorgan Anal Chem,2015,5-3):74-76.
[6]QB/T 2020-2016中华人民共和国轻工行业标准调味盐[S].QB/T 2020-2016 People's Republic of China light industry standard-Seasoning salt[S].
[7]袁宁,赵志荣,闫玉,等.调味盐中碘离子测定条件探索[J].盐科学与化工,2018,-6):13-15.Yuan N,Zhao ZR,Yan Y,et al.Explore the conditions for determination of iodine ions in seasoning salt[J].J Salt Sci Chem Ind,2018,-6):13-15.
[8]张玲玲,崔志强.菇盐系列产品中碘离子的测定[J].盐科学与化工,2018,-1):13-16.Zhang LL,Cui ZQ.Determination of iodide in mushroom salt product[J].J Salt Sci Chem Ind,2018,-1):13-16.
[9]GB 26878-2011食品安全国家标准食用盐碘含量[S].GB 26878-2011 Food safety national standard-Salt iodine content[S].
[10]佟云琨.调味盐中碘离子的测定[J].盐业与化工,2013,-3):35-37.Tong YK.Determination of the iodine in seasoning salt[J].J Salt Sci Chem Ind,2013,-3):35-37.
[11]GB 5009.42-2016食品安全国家标准食盐指标的测定[S].GB 5009.42-2016 National food safety standard-Determination of the index of salt[S].
[12]谭江涛,沈敏,魏瑜.有机碘测定方法初探[J].中国井矿盐,2014,-45):40-42.Tan JT,Shen M,Wei Y.Brief discussion on methods for organic iodine determination[J].China Well Rock Salt,2014,-45):40-42.
[13]袁晓鹰,周尊英.准确度、正确度和精密度试验间的区别与关系[J].煤质技术,2008,-3):30-33.Yuan XY,Zhou ZY.The distinction and relationship of the test of accuracy,trueness and precision[J].Coal Qual Technol,2008,-3):30-33.
[14]GB/T 5461-2016中华人民共和国国家标准食用盐[S].GB/T 5461-2016 PRC National standard-Edible salt[S].
[15]赵宇明,陈岩.氧化还原滴定法测定液态海藻碘类产品中碘含量[J].江苏调味副食品,2016,-4):41-43.Zhao YM,Chen Y.Determination of iodine content in liquid alginate iodine products by oxidation-reduction titration[J].Jiangsu Condiment Subsid Food,2016,-4):41-43.
[2]李军.碘缺乏病及其防制对策分析[J].临床医药文献电子杂志,2017,-78):15326-15326.Li J.Analysis of iodine deficiency disease and its countermeasures[J].JClin Med Literat,2017,-78):15326-15326.
[3]GB/T 13025.7-2012制盐工业通用试验方法碘的测定[S].GB/T 13025.7-2012 General test method in salt industry-Determination of iodine[S].
[4]赵卫京.应用自动电位滴定法测定食用盐中的碘离子[J].微量元素与健康研究,2016,33-4):56-59.Zhao WJ.Determination of iodine ions in edible salt by automatic potentiometric titration[J].Stud Trace Element Health,2016,33-4):56-59.
[5]王晓玲,张萍,陈燕.盐酸氯丙嗪显色-分光光度法快速测定食盐中的碘含量[J].中国无机分析化学,2015,5-3):74-76.Wang XL,Zhang P,Chen Y.Determination of iodine in salt based on color reaction between chlorpromazine and indate root by spectrophotometric method[J].Chin J Inorgan Anal Chem,2015,5-3):74-76.
[6]QB/T 2020-2016中华人民共和国轻工行业标准调味盐[S].QB/T 2020-2016 People's Republic of China light industry standard-Seasoning salt[S].
[7]袁宁,赵志荣,闫玉,等.调味盐中碘离子测定条件探索[J].盐科学与化工,2018,-6):13-15.Yuan N,Zhao ZR,Yan Y,et al.Explore the conditions for determination of iodine ions in seasoning salt[J].J Salt Sci Chem Ind,2018,-6):13-15.
[8]张玲玲,崔志强.菇盐系列产品中碘离子的测定[J].盐科学与化工,2018,-1):13-16.Zhang LL,Cui ZQ.Determination of iodide in mushroom salt product[J].J Salt Sci Chem Ind,2018,-1):13-16.
[9]GB 26878-2011食品安全国家标准食用盐碘含量[S].GB 26878-2011 Food safety national standard-Salt iodine content[S].
[10]佟云琨.调味盐中碘离子的测定[J].盐业与化工,2013,-3):35-37.Tong YK.Determination of the iodine in seasoning salt[J].J Salt Sci Chem Ind,2013,-3):35-37.
[11]GB 5009.42-2016食品安全国家标准食盐指标的测定[S].GB 5009.42-2016 National food safety standard-Determination of the index of salt[S].
[12]谭江涛,沈敏,魏瑜.有机碘测定方法初探[J].中国井矿盐,2014,-45):40-42.Tan JT,Shen M,Wei Y.Brief discussion on methods for organic iodine determination[J].China Well Rock Salt,2014,-45):40-42.
[13]袁晓鹰,周尊英.准确度、正确度和精密度试验间的区别与关系[J].煤质技术,2008,-3):30-33.Yuan XY,Zhou ZY.The distinction and relationship of the test of accuracy,trueness and precision[J].Coal Qual Technol,2008,-3):30-33.
[14]GB/T 5461-2016中华人民共和国国家标准食用盐[S].GB/T 5461-2016 PRC National standard-Edible salt[S].
[15]赵宇明,陈岩.氧化还原滴定法测定液态海藻碘类产品中碘含量[J].江苏调味副食品,2016,-4):41-43.Zhao YM,Chen Y.Determination of iodine content in liquid alginate iodine products by oxidation-reduction titration[J].Jiangsu Condiment Subsid Food,2016,-4):41-43.