Daka Joseph N, Moodie Gerry, Dinardo Anthony, Kramer Gary H
National Calibration and Reference Centre, Radiation Protection Bureau, Health Canada, 775 Brookfield Road, PL# 6302D, Ottawa, ON, Canada K1A 1C1.
Radiat Prot Dosimetry. 2012 Jan;148(2):242-8. doi: 10.1093/rpd/ncr012. Epub 2011 Feb 25.
A simple, but novel technique, for adjusting steeps of black tea to produce fluids, which are visually and spectroscopically similar to urine, has been developed at the National Calibration Reference Centre for Bioassay and In Vivo Monitoring in Canada. The method uses scans of absorbance versus wavelength, in the UV-VIS range (200-800 nm) to select diluted tea steeps that simulate urine. Tea solutions (1 and 10 %) were spiked with tritium and distributed to laboratories for performance testing (PT). The PT exercise was done as in a regular bioassay programme. The results showed that all samples satisfied the pass/fail conditions of the S-106 standard of the Canadian Nuclear Safety Commission, suggesting that adjusted tea successfully simulated urine for the tritium PT programmes. Also, since unlike urine whose use may increase the probability of contaminating and transmitting diseases (e.g. hepatitis C), tea is a safer alternative. When needed, it can readily be prepared for the laboratories.
加拿大生物测定与体内监测国家校准参考中心开发出一种简单但新颖的技术，用于调配红茶茶汤，使其在视觉和光谱上与尿液相似。该方法利用紫外-可见范围（200 - 800纳米）内吸光度与波长的扫描结果，来选择模拟尿液的稀释茶汤。将含有氚的茶溶液（1%和10%）分发给各实验室进行性能测试（PT）。PT活动按照常规生物测定程序进行。结果表明，所有样品均符合加拿大核安全委员会S - 106标准的合格/不合格条件，这表明调配后的茶成功模拟了用于氚PT计划的尿液。此外，与尿液不同，使用尿液可能会增加疾病污染和传播（如丙型肝炎）的概率，而茶是一种更安全的替代品。如有需要，可为实验室随时准备好茶。
