Preparation Technique of Vapor Sample of Volatile Liquid for FTIR Analysis;

Near infrared spectrum (especially the diffuse reflection spectrum of powder or seed) is easily affected by sample's state and loading condition because of the lower Signal Noise Ratio in the spectrum region and the complex back- ground while detecting.

Laser-induced breakdown spectroscopy was used to analyze coal samples, and the influence of sample morphology on laser ablation properties of coal was analyzed.