A method for estimating radioactive cesium concentrations in cattle blood using urine samples
A method for estimating radioactive cesium concentrations in cattle blood using urine samples
复制标题
一种利用尿液样本估算牛血中放射性铯浓度的方法
DOI：
10.1111/asj.12879
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发表时间：
2017
影响因子：
2
通讯作者：
Otani K. and Okada K.
中科院分区：
文献类型：
--
作者：
Sato I.;Yamagishi R.;Sasaki J.;Satoh H.;Miura K.;Kikuchi K.;Otani K. and Okada K.
在受福岛核事故污染的地区，活牛屠宰前应检查放射性污染。在这项研究中，我们建立了一个精确的方法来估计放射性铯浓度的牛血液中使用尿液样品。在“难以返回区”的两个农场共采集了71头牛的血液和尿液样本。测定尿137 Cs、比重、电导率、pH、钠、钾、钙和肌酐，并测试血液137 Cs的各种估计方法。估计的平均误差率为54.2%。校正尿肌酐、比重、电导率或钾可提高估计的精确度。使用以下公式校正比重，得到最精确的估计值（平均误差率= 16.9%）：[血液137 Cs] = [尿液137 Cs]/（[比重]-1）/329。尿样比血样测量更快，因为尿样可以获得更大的量，并且比血液具有更高的137 Cs浓度。这些优势的尿液和估计精度表明，在我们的研究中，使用尿液样品估计血137 Cs是一个实用的手段，监测放射性污染的活牛。
In the region contaminated by the Fukushima nuclear accident, radioactive contamination of live cattle should be checked before slaughter. In this study, we establish a precise method for estimating radioactive cesium concentrations in cattle blood using urine samples. Blood and urine samples were collected from a total of 71 cattle on two farms in the ‘difficult‐to‐return zone’. Urine137Cs, specific gravity, electrical conductivity, pH, sodium, potassium, calcium, and creatinine were measured and various estimation methods for blood137Cs were tested. The average error rate of the estimation was 54.2% without correction. Correcting for urine creatinine, specific gravity, electrical conductivity, or potassium improved the precision of the estimation. Correcting for specific gravity using the following formula gave the most precise estimate (average error rate = 16.9%): [blood137Cs] = [urinary137Cs]/([specific gravity] − 1)/329. Urine samples are faster to measure than blood samples because urine can be obtained in larger quantities and has a higher137Cs concentration than blood. These advantages of urine and the estimation precision demonstrated in our study, indicate that estimation of blood137Cs using urine samples is a practical means of monitoring radioactive contamination in live cattle.