Signal stability is a fundamental requirement for an analytical spectroscopic technique. An auxiliary-flow based chamber is presented for emission signal stability in aerosol laser-induced breakdown spectroscopy (LIBS). The performance of the designed chamber was evaluated with the traditional aerosol LIBS scheme. Factors influencing optical emission including laser energy and particle size were carefully considered. Both intra-experiment and inter-experiment results exhibited excellent short-term and long-term stability of emission signals with the novel sampling scheme while traditional cross-chamber suffered 15% and 40% intensity decrease, respectively. The systematic air analysis before and after aerosol experiment determined that major cause of signal decrease in the cross-chamber was degraded optical transmission due to aerosol contamination on optical path which was eliminated in the auxiliary flow-based chamber. The proposed scheme can be used for the analysis of diverse aerosols types in various optical emission based analytical techniques.

信号稳定性是分析光谱技术的基本要求。提出了一种基于辅助流的腔室，用于在气溶胶激光诱导击穿光谱法（LIBS）中确保发射信号的稳定性。使用传统的气溶胶LIBS方案评估了设计室的性能。仔细考虑了影响光发射的因素，包括激光能量和粒径。无论内-experiment和间实验结果表明，采用新型采样方案的发射信号具有出色的短期和长期稳定性，而传统的交叉腔室强度分别降低了15％和40％。气雾剂实验之前和之后的系统空气分析确定，横室中信号下降的主要原因是由于光路中的气溶胶污染而导致的光传输性能下降，在基于辅助流动的腔室中消除了这种污染。所提出的方案可用于基于各种基于光发射的分析技术中的多种气溶胶类型的分析。