  We present a practical scheme for the efficient preparation of laser-cooled
$^{43}$Ca$^+$ ions in an ion trap. Our approach integrates two well-established
methods: isotope-selective photoionization and isotope-specific parametric
excitation. Drawing inspiration from the individual merits of each method, we
have successfully integrated these techniques to prepare extended chains of
$^{43}$Ca$^+$ ions, overcoming the challenge posed by their low natural
abundance of 0.135\% in a natural source. Furthermore, we explore the
subtleties of our scheme, focusing on the influence of different factors on the
purification process. Our investigation contributes to a broader understanding
of the technique and highlights the adaptability of established methods in
addressing specific isotopic challenges.
