Thermoluminescent detectors (TLDs) are often used for personal and environmental dosimetry. The investigations of accidental immersion in liquids or washing TLDs on the dose response are limited. Detectors are placed in the dedicated card, which, may not provide full protection against liquids. Such accidental contact with liquids affects correctness of the TLDs read-out depending on the type of detector. The purpose of this study was to evaluate MCP-N response for the same dose after contact with different liquids.

First, the stability of thirty four MCP-N detectors (LiF:Mg,Cu,P) manufactured at the Institute of Nuclear Physics in Krakow in a form of circular pellets ø 4.5 × 0.9 mm was checked. Then the procedure was as follows: weighting, annealing at 240 °C for 10 min, irradiation (dose 1.1 mGy), immersion in different liquids (water, tea, coffee, washing liquid) for 30 min, drying, reweighting, reannealing at 100 °C for 10 min, reweighting and read-out. Read-outs were performed using a RA-04 reader. Immersion was repeated 6 times in two phases. Six detectors were used as a reference group – they were not immersed at any liquid.

After immersion in tea and coffee MCP-N read-out was lower than before immersion and the sensitivity after the experiment significantly decreased (in average 60% and 66%). After immersion in water and in washing liquid MCP-N read-out was higher than before immersion whereas the sensitivity after the experiment slightly decreased (in average 8% and 12%). This reduction was probably apparent as in the reference group it was equal to 21%. Detector mass changes were observed in the range of ±1%.

Summarizing, dark liquids cause significant and immediate decrease of sensitivity while water or washing liquid cause apparent increase of sensitivity. This means in practice an underestimated or overestimated individual or environmental dose.

热发光检测器（TLD）通常用于个人和环境剂量测定。意外浸入液体或洗涤TLD对剂量反应的研究是有限的。检测器放置在专用卡中，该卡可能无法提供完全的防液体保护。这种与液体的意外接触会根据检测器的类型影响TLD读数的正确性。这项研究的目的是评估接触不同液体后相同剂量的MCP-N反应。

首先，检查了由克拉科夫核物理研究所制造的呈圆形小球ø4.5×0.9 mm的34个MCP-N检测器（LiF：Mg，Cu，P）的稳定性。然后，步骤如下：称重，在240°C下退火10分钟，辐照（剂量为1.1 mGy），浸入不同的液体（水，茶，咖啡，洗涤液）中30分钟，干燥，重新称重，在100℃下重新退火°C 10分钟，称重并读出。使用RA-04阅读器进行读出。分两个阶段将浸入重复6次。六个检测器用作参考组–它们没有浸入任何液体中。

浸入茶和咖啡后，MCP-N的读数低于浸入前，并且实验后的灵敏度显着降低（平均分别为60％和66％）。浸入水中和洗涤液中后，MCP-N的读数高于浸入前，而实验后的灵敏度略有下降（平均8％和12％）。这种减少可能是显而易见的，因为在参考组中，它等于21％。检测器质量变化在±1％的范围内。

总而言之，深色液体会导致敏感度立即显着降低，而水或洗涤液会导致敏感度明显增加。这实际上意味着个人或环境剂量被低估或高估了。