Black carbon and total organic carbon (TOC) along with organochlorines (OCs) were analyzed in soils from four sampling zones of Lesser Himalayan Region based on source proximity/anthropogenic influences along the altitude. CTO-375 method was used for BC analysis while OCs were analyzed by GC-MS/MS system. BC and TOC ranged between 0.16–1.77 and 6.8–41.3 mg g⁻¹ while those of OCPs and PCBs ranged between 0.69 and 5.77 and 0.12–2.55 ng g⁻¹, respectively. ∑DDTs were the dominant (87.9%) among OCPs while tri- and tetra- (65.5%) homologue groups among PCBs. Hexa-PCBs, however also showed higher contribution (20.4%) in the region. Source diagnostic ratios of DDE + DDD/DDT (0.1–1.53) indicated both fresh and old input while α-HCH/γ-HCH (0.19–2.49) showed presence of lindane in the region. Higher concentration of OCs were observed in Zone C at altitudinal range of 737–975 masl that are close to the human influences and potential sources of POPs. The results of linear regression analysis revealed potential input of BC in soil distribution of OC concentrations in the region.

根据沿海拔高度的源近程/人为影响，对小喜马拉雅地区四个采样区的土壤中的黑碳和总有机碳（TOC）以及有机氯（OCs）进行了分析。CTO-375方法用于BC分析，而OC通过GC-MS / MS系统进行分析。BC和TOC的范围分别在0.16-1.77和6.8-41.3 mg g ^-1之间，而OCP和PCB的BC和TOC的范围分别在0.69和5.77和0.12-2.55 ng g ^-1之间。Σ滴滴涕为优势（87.9％）的OCP之间而三-和多氯联苯间四- （65.5％）同系物基团。然而，六边形多氯联苯在该区域也表现出较高的贡献（20.4％）。DDE + DDD / DDT的源诊断率（0.1–1.53）表示新输入和旧输入，而α- HCH /γ-六氯环己烷（0.19–2.49）显示该区域存在林丹。在C区，海拔高度在737-975 massl范围内观察到了较高的OCs，这与人类的影响和POPs的潜在来源非常接近。线性回归分析的结果表明，BC在该地区OC浓度的土壤分布中的潜在输入。