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气相色谱-质谱联用法测定饲料中的多氯联苯Aroclor 1242系列 被引量:2
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作者 宋梓亮 李福儿 +2 位作者 汪勇 william riley 唐书泽 《广东农业科学》 CAS CSCD 北大核心 2012年第21期122-125,共4页
建立饲料中多氯联苯Aroclor 1242系列的气相色谱-质谱联用分析方法。Aroclor 1242标准溶液经GC-MS全扫描定性和选择离子定量后,按含氯数对各氯代联苯峰进行归类,制作标准曲线,线性关系良好,相关系数r>0.99。样品经索氏提取、浓硫酸... 建立饲料中多氯联苯Aroclor 1242系列的气相色谱-质谱联用分析方法。Aroclor 1242标准溶液经GC-MS全扫描定性和选择离子定量后,按含氯数对各氯代联苯峰进行归类,制作标准曲线,线性关系良好,相关系数r>0.99。样品经索氏提取、浓硫酸磺化、硅胶柱净化并浓缩定容至2 mL,经GC-MS测定,外标法定量,Aroclor 1242含量均低于方法检测限。加标试验的回收率在80%-115%之间。该方法简易可靠,在多氯联苯Aroclor系列的检测和评价方式上作出创新改进,具有实用价值。 展开更多
关键词 多氯联苯 AROCLOR 1242系列 气相色谱-质谱联用法 饲料
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Process engineering for primary care:Quality improvement and population health 被引量:3
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作者 william riley 《Family Medicine and Community Health》 2016年第2期29-35,共7页
A fundamental paradox of the health care delivery systems in many industrialized nations is that desired population health metrics are often not achieved despite large expenditures in the health care delivery system.F... A fundamental paradox of the health care delivery systems in many industrialized nations is that desired population health metrics are often not achieved despite large expenditures in the health care delivery system.For example,the United States commits nearly 18%of its GDP to the health care delivery system,the largest amount of any nation,yet is 37th in achieving health or health care delivery metrics.This article addresses how general practice can be an important driver of population health in the Chinese health care delivery system through the application of quality improvement methods.The article shows examples of how the cause-and-effect diagram,the process map,and the plan,do,study,act(PDSA)cycle are important techniques to assist primary care practitioners for improving population health. 展开更多
关键词 Population health general practice primary care quality improvement techniques
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