Comment on “Laser produced plasma diagnosis of carcinogenic heavy metals in gallstones” by M. A. Gondal, M. A. Shemis, A. A. I. Khalil, M. M. Nasr and B. Gondal, JAAS, 2016, 31, 506.

The selection of analytical lines to determine Pb, Cr, Cd, Hg, and Ni in gallstones in the recently published paper with the above title is criticized. Also, the unreliable calibration of their spectrometer is demonstrated as a reason for incorrect assignment of spectral lines. [ABSTRACT FROM AUTHOR]