We report and analyze updated molecular abundances in 20 comets obtained by employing modern data reduction procedures and molecular models. Using box and scatter plots, we examine how the different molecular species are distributed among the comet population, while by means of pie charts, we investigate the relative proportions of these molecular species in each comet. We compare these results with the orbital parameters of the selected comets to identify trends related to their dynamical history. With these analyses, we tentatively identify at least three chemical classes based mainly on relative abundances of CO, CH₃OH, CH₄, C₂H₆, HCN, and NH₃. The combination of relative abundances and orbital parameters is then compared with recent chemical models of planetary system formation. This approach may help in investigating the origins and evolution of the material in cometary nuclei. Among other aspects, we underline the need to increase our sample size, especially for hypervolatiles (i.e., CH₄ and CO) in Jupiter family comets.

我们报告和分析了通过采用现代数据简化程序和分子模型获得的 20 颗彗星的最新分子丰度。使用箱线图和散点图，我们研究了不同分子种类在彗星种群中的分布情况，而通过饼图，我们研究了这些分子种类在每颗彗星中的相对比例。我们将这些结果与选定彗星的轨道参数进行比较，以确定与其动力学历史相关的趋势。通过这些分析，我们主要根据 CO、CH ₃ OH、CH ₄、C ₂ H ₆、HCN 和 NH _{3 的}相对丰度初步确定了至少三个化学类别. 然后将相对丰度和轨道参数的组合与行星系统形成的最新化学模型进行比较。这种方法可能有助于研究彗核中物质的起源和演化。在其他方面，我们强调需要增加我们的样本量，特别是对于木星家族彗星中的超挥发性物质（即 CH ₄和 CO）。