The Jiangmen Underground Neutrino Observatory (JUNO) requires that the detector use liquid scintillator with an extremely low background to achieve the desired measurement accuracy of neutrino mixing parameters. In addition, the production process of the liquid scintillator must avoid radon gas contamination caused by equipment leakage. Direct measurement of radon gas in liquid scintillator is an option for system leak detection. However, considering the low percentage of radon gas and high percentage of oxygen in air, the measurement of oxygen in liquid scintillator will have higher sensitivity. Based on Henry's law and the measuring principle of a dissolved oxygen meter, an experimental device is designed to measure Henry's law coefficient and calibrate the dissolved oxygen meter. Henry's law coefficient of oxygen in linear alkylbenzene (LAB) at 23.6 °C derived from an experimental measurement is 2.09 × 10⁷ ± 2.54 × 10⁶ Pa·L·mol^-1. The feasibility of using a dissolved oxygen meter to measure the dissolved oxygen content in LAB is verified by calibrating the dissolved oxygen meter.

中文翻译：

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JUNO 实验室中氧亨利定律系数的测定

江门地下中微子观测站（JUNO）要求探测器使用背景极低的液体闪烁体，以达到理想的中微子混合参数测量精度。此外，液体闪烁体的生产过程必须避免设备泄漏造成的氡气污染。直接测量液体闪烁体中的氡气是系统泄漏检测的一种选择。但考虑到空气中氡气百分比较低、氧气百分比较高，液体闪烁体中氧气的测量将具有更高的灵敏度。基于亨利定律和溶解氧计的测量原理，设计了一种测量亨利定律系数并校准溶解氧计的实验装置。实验测定23.6℃直链烷基苯(LAB)中氧的亨利定律系数为2.09×10 ⁷ ±2.54×10 ⁶ Pa·L·mol ^-1。通过溶解氧计的校准验证了使用溶解氧计测量实验室溶解氧含量的可行性。