A highly sensitive and selective sensor for isobutyraldehyde (IBD) is demonstrated based on intensive cataluminescence (CTL) emission from the surface of nanosized Sm₂O₃ particles. The characteristics and optimum conditions for the CTL sensor, including the working temperature, wavelength, and flow rate, were investigated in detail. Under the optimized experimental conditions, the CTL intensity varied linearly with the concentration of IBD, in the two-order-of-magnitude range of 0.015–3.9 μg/mL, with a correlation coefficient (r) of 0.99991 and a limit of detection (LOD), at a signal-to-noise ratio (S/N = 3) of 4.6 ng/mL. The sensor was quite specific: butyraldehyde, methanol, ethanol, acetone, formaldehyde, acetaldehyde, benzene, ethylbenzene, and cumene could not produce significant CTL intensities; specifically, butyraldehyde, ethanol, acetone, and acetaldehyde produced low CTL intensities, with values that were 3.8%, 2.8%, 0.60%, and 0.57% that of IBD. As a test of sensor stability, we found that the relative standard deviation (RSD) of 30 measurements of the CTL at an IBD concentration of 1.6 μg/mL within a period of 72 h was 2.2%, indicating good stability and long service life of the sensor. The sensor was tested against spiked samples containing IBD, and recoveries between 89.7% and 97.4% were obtained with an RSD of 6.1%–8.6%. The performance of the sensor indicated its utility for practical sample analysis.

中文翻译：

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基于纳米Sm2O3颗粒的高灵敏度和选择性的异丁醛传感器。

基于从纳米级Sm ₂ O ₃颗粒表面的强烈催化发光（CTL）发射，证明了一种用于异丁醛（IBD）的高灵敏度和选择性传感器。详细研究了CTL传感器的特性和最佳条件，包括工作温度，波长和流速。在优化的实验条件下，CTL强度与IBD的浓度线性变化，在两阶数量级的范围内的0.015-3.9  μ克/毫升，用相关系数（ř）和0.99991的检测限（LOD），信噪比（S / N = 3）为4.6 ng / mL。该传感器具有很强的特异性：丁醛，甲醇，乙醇，丙酮，甲醛，乙醛，苯，乙苯和异丙基苯不能产生显着的CTL强度。具体而言，丁醛，乙醇，丙酮和乙醛产生的CTL强度较低，分别为IBD的3.8％，2.8％，0.60％和0.57％。作为传感器稳定性试验，我们发现，相对标准偏差（RSD）的CTL的30个测量在1.6的IBD浓度 μ72小时内的g / mL为2.2％，表明传感器具有良好的稳定性和较长的使用寿命。该传感器经过了针对含有IBD的加标样品的测试，回收率在89.7％至97.4％之间，RSD为6.1％–8.6％。传感器的性能表明它可用于实际样品分析。