Results from gas chromatograms of normal and perdeuterated odorants from distinct lots and sources, as indicated from those on Table 2 and Figure 1. The percentage (Area %) of the total that constitutes the main species within each preparation is shown in bold. The batch numbers of isotopologues distinct from those on Table 1 are indicated. Distinct trace impurities were present in the 1-hexanol preparation from Lluch Essence compared to that from Fluka Analytical (Table 2). The deuterated 1-hexanol contained fewer contaminants, which, however, constituted a slightly larger fraction of the sample, since pure d13-1-HEL exhibited 99.5% purity in this sample compared to 99.7% in the one in Table 2. Similarly, h-BNZ contained fewer contaminants than that in Table 2, but it constituted a lower percentage of the sample (94.4% vs 98.7% in Table 2), because a larger proportion was benzoic acid (Ret time, 19.153). d6-BNZ also contained additional contaminants from that in Table 2 (Ret times, 8.105, 8.937) and contained a larger percentage (5.03%) of deuterated benzoic acid than the batch in Table 2. Nevertheless, the EAG responses of the two sets of batches were similar. In contrast, the normal ACP sample was purer than the original one (Table 4), and the same was true for the d8-ACP sample. Based on retention times, there are no common contaminants in the two isotopologue preparations.