The authors introduce an arc ion plating method for the deposition of chromium oxide (Cr2O3) on a steel wire substrate, and its use as a coating for solid phase microextraction. The coating has a micro- and nano-scaled structure after annealing at 700 °C. It is found that Cr2O3 exhibits a good extraction capability for the aromatic hydrocarbons naphthalene, anthracene, fluorene, fluoranthene, and biphenyl. Following desorption by high temperature at 300 °C, the analytes were quantified by gas chromatography (GC). The limits of detection are in the range between 20 and 200 ng·L−1, and calibration plots are linear within a wide range (0.2 to 400 μg·L−1). The coating has excellent mechanical properties, with a hardness is as high as 31.7 GPa, and the adhesion strength between coating and substrate reaches 20.1 N (corresponding to the critical Hertzian contact stress of 10 GPa). This, along with the chemical and thermal stability of the Cr2O3 coating, endows the wire with a long operational life. It was used for at least 100 times without any obvious decline of extraction capability.Graphical abstractAn arc ion plating method was introduced for the deposition of chromium oxide (Cr2O3) on a steel wire substrate, and its use as a coating for solid phase microextraction with high mechanical strength, stability, and long operational lifetime.

中文翻译：

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一种用于芳烃固相微萃取的电弧离子镀法制备的氧化铬（III）涂层钢丝

作者介绍了一种电弧离子镀法，用于在钢丝基材上沉积氧化铬 (Cr2O3)，并将其用作固相微萃取涂层。该涂层在 700 °C 退火后具有微米和纳米级结构。发现Cr2O3对萘、蒽、芴、荧蒽和联苯等芳香烃具有良好的萃取能力。在 300 °C 高温下解吸后，分析物通过气相色谱 (GC) 进行定量。检测限在 20 到 200 ng·L-1 之间，校准曲线在很宽的范围内（0.2 到 400 μg·L-1）呈线性。该涂层具有优异的机械性能，硬度高达31.7GPa，涂层与基材的附着强度达到20。1 N（对应于 10 GPa 的临界赫兹接触应力）。这一点，连同 Cr2O3 涂层的化学和热稳定性，使电线具有很长的使用寿命。使用至少100次，萃取能力没有明显下降。 图文摘要介绍了一种电弧离子镀法，用于在钢丝基材上沉积氧化铬（Cr2O3），并将其用作固相微萃取涂层机械强度高，稳定性好，使用寿命长。