Cunningham W C, Stroube W B
Sci Total Environ. 1987 May;63:29-43. doi: 10.1016/0048-9697(87)90034-9.
The capabilities of a relatively simple instrumental neutron activation analysis procedure were demonstrated by performing multielement analyses of 240 Food and Drug Administration Total Diet Studies food composites. The analytical results provide a comprehensive database for a wide range of food types. The procedure incorporates only two irradiations and counts, polyethylene packaging and no sample transfer after irradiation. Concentrations were determined for 19 elements, 16 of which were found in most composites. Detection limits were calculated for all food groups and are given for the 22 elements included in the quantitative analysis scheme. In a qualitative search for 18 additional elements for which no standards were run, none were detected in any of the composites. Specific factors such as interferences from the blank are discussed in regard to their effects on the uncertainties associated with the experimental data and the detection limits. Modifications to the procedure are also suggested for lowering the detection limits for specific elements.
通过对240份美国食品药品监督管理局总膳食研究食品组合进行多元素分析，证明了一种相对简单的仪器中子活化分析程序的能力。分析结果为广泛的食品类型提供了一个综合数据库。该程序仅包括两次辐照和计数，采用聚乙烯包装，辐照后无需转移样品。测定了19种元素的浓度，其中16种在大多数组合中都能找到。计算了所有食物组的检测限，并给出了定量分析方案中包含的22种元素的检测限。在对另外18种未运行标准品的元素进行定性搜索时，在任何组合中均未检测到。讨论了诸如空白干扰等特定因素对与实验数据和检测限相关的不确定性的影响。还建议对该程序进行修改，以降低特定元素的检测限。
