Iyengar G V, Kasperek K, Feinendegen L E, Wang Y X, Weese H
Sci Total Environ. 1982 Aug;24(3):267-74. doi: 10.1016/0048-9697(82)90005-5.
Concentrations of Co, Cu, Fe, Hg, Mn, Sb, Se and Zn in IAEA milk (dry) standard A-11 were re-evaluated with the help of instrumental and radiochemical neutron activation analysis (NAA). The results show reasonably good agreement for Co (5.1 +/- 0.55 ng/g) and Zn (34 +/- 2.5 micrograms/g), in relation to the recommended values. For Cu (374 +/- 15 ng/g), Fe (2.4 +/- 0.34 microgram/g) and Mn (250 +/- 20 ng/g); the results obtained are lower than the reported values. Cu, Mn, and Zn were cross-checked by atomic absorption spectrophotometry (AAS). The results, Cu = 331 +/- 27 ng/g, Mn = 302 +/- 62 ng/g, and Zn = 35 +/- 1 microgram/g, fall within the range of mean values obtained by NAA. for Hg and Se, using instrumental NAA, only upper limits could be indicated; because of the low levels of concentrations of Hg and Se on one hand, and high content of P (9100 micrograms/g) in A-11 milk standard on the other, NAA coupled with radiochemistry is to be preferred for these two elements. In pooled human milk, in addition to Cu and Mn (radiochemical) and Co, Fe, Sb and Zn (instrumental), Hg and Se could also be determined non-destructively because of the favorable Hg/P and Se/P ratios in this matrix.
借助仪器中子活化分析和放射化学中子活化分析（NAA），对国际原子能机构（IAEA）牛奶（干）标准物质A - 11中的钴（Co）、铜（Cu）、铁（Fe）、汞（Hg）、锰（Mn）、锑（Sb）、硒（Se）和锌（Zn）的浓度进行了重新评估。结果表明，钴（5.1±0.55纳克/克）和锌（34±2.5微克/克）与推荐值相比，吻合度较好。对于铜（374±15纳克/克）、铁（2.4±0.34微克/克）和锰（250±20纳克/克），所得结果低于报告值。采用原子吸收分光光度法（AAS）对铜、锰和锌进行了交叉核对。结果，铜 = 331±27纳克/克，锰 = 302±62纳克/克，锌 = 35±1微克/克，落在通过NAA获得的平均值范围内。对于汞和硒，使用仪器NAA只能给出上限；一方面由于汞和硒的浓度水平较低，另一方面由于A - 11牛奶标准中磷（P）含量较高（9100微克/克），对于这两种元素，优先选择NAA与放射化学联用的方法。在人乳混合样本中，除了铜和锰（放射化学法）以及钴、铁、锑和锌（仪器法）外，由于该基质中汞/磷和硒/磷的比例有利，汞和硒也可以进行无损测定。
