mAU

Non-PRO English to Chinese Science Chemistry; Chem Sci/Eng HPLC or UHPLC

There is a term or unit I do not understand "mAU" in HPLC or UHPLC related to column technique.
Does it mean “毫吸收率单位 mili absortion unit“？
请光谱学色谱学专家指教。谢谢！