Feasibility study of calibration strategy for direct quantitative measurement…

a b s t r a c t: The calibration and quantitative measurement is the ‘‘Achilles heel’’ of the LIBS technique. This paper deals with a method developed for the direct measurement of K and Mg in plant samples. Instrumental parameters were optimized and the best condition found was a 50 lm spot size, 10 Hz laser repetition rate, 75 accumulated laser pulses with 25 mJ/pulse and 0.25 ls of …