The presence of oxygen isotopic anomaly in hydrogen peroxide (H₂O₂) has been established by measurements of three oxygen isotopes (¹⁶O, ¹⁷O, ¹⁸O) in H₂O₂ from experiments on H₂O₂ formation using a water vapour discharge in presence of (O₂, CO₂, Ar) gases and using VUV photolysis of water vapour. The termolecular OH recombination reaction may be account for the source of MIF in H₂O₂ due to a selective isotopic enrichment through the radical pair mechanism with non-equivalent nuclei. It was established that the magnitude of the observed MIF signals in H₂O₂ depended on the presence of oxidising gases.

中文翻译：

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氧的实验研究同位素异常（ Δ ¹⁷ O）h的₂ ö ₂和它们的关系，以自由基复合反应

氧同位素的异常在氢存在下用过氧化（H ₂ ö ₂）已经由三个氧同位素测量（建立¹⁶ O，¹⁷ O，¹⁸ O）H中₂ ö ₂从实验上ħ ₂ ö ₂使用水形成在（O ₂，CO ₂，Ar）气体存在下并使用VUV光解水蒸气进行蒸汽排放。分子羟基重组反应可能是H ₂ O ₂中MIF的来源归因于通过具有非等价原子核的自由基对机制进行的选择性同位素富集。已经确定，在H ₂ O _2中观察到的MIF信号的强度取决于氧化性气体的存在。