本文利用微波消解对黄豆进行前处理,采用电感耦合等离子体质谱法(Inductively Coupled Plasma Mass Spectrometer,ICP-MS)对消解液中26种元素的含量进行测定,对方法的线性、精密度、准确度及质控样品进行验证。结果表明,各元素标准曲线...本文利用微波消解对黄豆进行前处理,采用电感耦合等离子体质谱法(Inductively Coupled Plasma Mass Spectrometer,ICP-MS)对消解液中26种元素的含量进行测定,对方法的线性、精密度、准确度及质控样品进行验证。结果表明,各元素标准曲线的相关系数均≥0.9990,线性关系良好,检出限为0.000583~0.453000 mg·kg^(-1),相对标准偏差≤5.513%,加标回收率为77%~113%,说明该方法能准确检测黄豆中无机元素,满足日常监测需求。展开更多
This study identified the role of milling and parboiling on arsenic(As)content and its species in large numbers of rice samples.Total As contents were 108±33μg/kg in polished rice grains(PR),159±46μg/kg in...This study identified the role of milling and parboiling on arsenic(As)content and its species in large numbers of rice samples.Total As contents were 108±33μg/kg in polished rice grains(PR),159±46μg/kg in unpolished rice grains(UR),145±42μg/kg in parboiled polished rice grains(PPR)and 145±44μg/kg in parboiled unpolished rice grains(PUR).The percentages of inorganic As(iAs)were 66%±8%in PR and from 72%to 77%in other grain categories.The polishing process reduced the As content in the rice grains,removing outer part of the UR with high amount of As,whereas the parboiling technique transferred the semimetal content within the grain.Total As and iAs contents were not significantly different in UR,PPR and PUR,homogenizing its distribution inside the grains.The results allowed to understand how different operations affect As fate and its chemical forms in grains.展开更多
文摘This study identified the role of milling and parboiling on arsenic(As)content and its species in large numbers of rice samples.Total As contents were 108±33μg/kg in polished rice grains(PR),159±46μg/kg in unpolished rice grains(UR),145±42μg/kg in parboiled polished rice grains(PPR)and 145±44μg/kg in parboiled unpolished rice grains(PUR).The percentages of inorganic As(iAs)were 66%±8%in PR and from 72%to 77%in other grain categories.The polishing process reduced the As content in the rice grains,removing outer part of the UR with high amount of As,whereas the parboiling technique transferred the semimetal content within the grain.Total As and iAs contents were not significantly different in UR,PPR and PUR,homogenizing its distribution inside the grains.The results allowed to understand how different operations affect As fate and its chemical forms in grains.
