The detection of silver using microwave-assisted laser induced breakdown spectroscopy (MW-LIBS) is demonstrated in solid and liquid samples at a 338.28 nm emission line. For solid sample analysis, the limit of detection (LoD) with a gated detector has been compared with that of a portable spectrometer with a non-gated detector. The LoD achieved by the gated and non-gated detectors are 4.5 ± 1.0 ppm and 7 ± 2.3 ppm, respectively. For aqueous silver, the LoD was found to be 385 ± 51 ppb. The LoD of MW-LIBS is more effective in liquid sample analysis than in solid sample analysis for atomic detection. The accuracy of the established calibration curve, based on the gated detector, has been verified to be ∼84%. For MW-LIBS, it was observed that relatively low laser energy is sufficient to develop a calibration curve and achieve an outstanding LoD.

中文翻译：

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使用微波辅助激光诱导击穿光谱技术检测门控和非门控银

在338.28 nm发射线处的固体和液体样品中，使用微波辅助激光诱导击穿光谱法（MW-LIBS）对银进行了检测。对于固体样品分析，已将使用门控检测器的检测极限（LoD）与使用非门控检测器的便携式光谱仪的检测极限进行了比较。门控和非门控检测器的LoD分别为4.5±1.0 ppm和7±2.3 ppm。对于水性银，发现LoD为385±51 ppb。MW-LIBS的LoD在液体样品分析中比在用于原子检测的固体样品分析中更有效。基于门控检测器，建立的校准曲线的准确性已被验证为〜84％。对于MW-LIBS，观察到较低的激光能量足以形成校准曲线并获得出色的LoD。