Production of multi-ionized species in the standard model. Abundances profiles of carbon-bearing species (top panels), nitrogen-bearing species (middle panels), and oxygen-bearing species (bottom panels) as functions of the distance in the preshock (left panels) and in the shock (right panels). The high ionization stages of carbon, nitrogen, and oxygen (C⁶⁺, N⁶⁺, N⁷⁺, O⁷⁺, and O⁸⁺) are not included because their relative abundances are all below the lowest value shown in this figure.