Hexafluoroisopropanol(HFIP)-induced sodium dodecyl sulfate/dodecyltrimethylammonium bromide(SDS/DTAB) catanionic surfactant coacervate extraction method coupled with high performance liquid chromatography(HPLC) was us...Hexafluoroisopropanol(HFIP)-induced sodium dodecyl sulfate/dodecyltrimethylammonium bromide(SDS/DTAB) catanionic surfactant coacervate extraction method coupled with high performance liquid chromatography(HPLC) was used to detect the migration of phthalates from disposable tablewares to drinking water. The concentration factors are larger than 82 and extraction recoveries over 53% for water samples spiked with 100 or 200 ng/m L phthalates. Limit of detection is in the range of 1.0–2.6 ng/m L.Good linearity with correlation coefficients larger than 0.9985 is obtained in the concentration of20–1500 or 40–3000 ng/m L. Relative recoveries are from 82.4% to 123.6% for water samples spiked with30/60, 250/500, and 1500/3000 ng/m L phthalates, respectively. Relative standard deviations(RSDs) are0.4%–7.4% for intraday precision(n = 5) and 0.6%–7.8% for interday precision(n = 3). Four of studied phthalates are found in the drinking water samples prepared from four kinds of tablewares.展开更多
本文建立了电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)同时测定一次性可降解餐饮具中11种特定金属元素含量的分析方法。以HNO;-H;O;(6︰2)作为酸消解体系,并加入一定量的金元素用于提高汞的稳定性,...本文建立了电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)同时测定一次性可降解餐饮具中11种特定金属元素含量的分析方法。以HNO;-H;O;(6︰2)作为酸消解体系,并加入一定量的金元素用于提高汞的稳定性,采用微波消解法对样品进行消解,外标法定量测定。各元素均呈现良好的线性关系,相关系数在0.99969~0.99998之间,方法检出限在0.006~0.128mg/kg之间,加标回收率为81.3%~110.7%,精密度在0.93%~3.91%之间。该方法操作简便,检出限低,准确度高,适用于同时测定一次性可降解餐饮具中11种金属元素含量。展开更多
基金the National Natural Science Foundation of China(Grant no.81373045)the Provincial Natural Science Foundation of Hubei of China(Grant no.2015CFA139)
文摘Hexafluoroisopropanol(HFIP)-induced sodium dodecyl sulfate/dodecyltrimethylammonium bromide(SDS/DTAB) catanionic surfactant coacervate extraction method coupled with high performance liquid chromatography(HPLC) was used to detect the migration of phthalates from disposable tablewares to drinking water. The concentration factors are larger than 82 and extraction recoveries over 53% for water samples spiked with 100 or 200 ng/m L phthalates. Limit of detection is in the range of 1.0–2.6 ng/m L.Good linearity with correlation coefficients larger than 0.9985 is obtained in the concentration of20–1500 or 40–3000 ng/m L. Relative recoveries are from 82.4% to 123.6% for water samples spiked with30/60, 250/500, and 1500/3000 ng/m L phthalates, respectively. Relative standard deviations(RSDs) are0.4%–7.4% for intraday precision(n = 5) and 0.6%–7.8% for interday precision(n = 3). Four of studied phthalates are found in the drinking water samples prepared from four kinds of tablewares.
文摘本文建立了电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)同时测定一次性可降解餐饮具中11种特定金属元素含量的分析方法。以HNO;-H;O;(6︰2)作为酸消解体系,并加入一定量的金元素用于提高汞的稳定性,采用微波消解法对样品进行消解,外标法定量测定。各元素均呈现良好的线性关系,相关系数在0.99969~0.99998之间,方法检出限在0.006~0.128mg/kg之间,加标回收率为81.3%~110.7%,精密度在0.93%~3.91%之间。该方法操作简便,检出限低,准确度高,适用于同时测定一次性可降解餐饮具中11种金属元素含量。
