METHOD FOR DETERMINING TRACE CONSTITUENTS BY LASER-SPARK EMISSION SPECTROSCOPY Russian patent published in 2015 - IPC G01N21/63 

FIELD: measurement equipment.

SUBSTANCE: invention relates to analytical atomic spectrometry and can be used in a spectral analysis for an express method of determining an element composition of a substance. The method is based on action of two subsequent collinear laser pulses directed to one point of a sample surface; with that, a value of inter-pulse delay is chosen equal to the time for which at single-pulse action on the sample there achieved is maximum signal-to-noise ratio. Radiation of laser plasma after action of the second pulse is recorded by means of a spectrograph and a gated electronic-optic digital chamber, and then, quantitative determination of trace components of the sample is performed via emission atomic and ionic lines.

EFFECT: invention provides improvement of sensitivity and express properties of the analysis at interaction of two laser radiation pulses per sample.