在法属西印度群岛(FWI)应用的众多有机氯(OCs)中,如今,十氯酮(水合形式C10Cl10O2H2;CLD)仍然会造成重大的环境污染。最近的一份报告显示,由于缺乏商业标准,未对CLD的转化产品(TP)在FWI环境中意外存在。这里,我们提出了一种地表水和地下水分析CLD的方法,其主要TP(hydroCLD,氯醇(CLDOH),10-单氢CLDOH和聚氯茚)和其他OCs。我们使用PDMS-DVB光纤开发了SPME-GC-SIM/MS方法。由于CLDOH-d通常用作内标(IS)被证明不合适,我们合成了几个IS候选人,并最终确定10-单氢-5-甲基-氯醇是CLDOH和10-单氢CLDOH的令人满意的IS,避免使用13C标记的类似物。CLD及其TP的LOD从0.3到10ng/L不等,等于或低于两个实验室的LOD,BRGM(法国地质调查局)和LDA26(法国部门分析实验室之一),在使用液-液萃取和先进设施的FWI污染监测中要求(LLE-GC-MS/MS和LLE-LC-MS/MS方法,分别)。然后,我们将多残基方法扩展到30个OCs(CLD及其TP,灭蚁灵,β-HCH,林丹,狄氏剂,艾氏剂,HCB,六氯丁二烯,TCE,PCE),并将其应用于FWI的30个地表水和地下水。而CLD,8-和10-单氢CLD,克洛托,10-单氢CLDOH,狄氏剂,并对β-HCH进行了检测和量化,五氯茚,另一个CLDTP,偶尔发现微量水平。与BRGM和LDA26的比较证实了SPME方法的兴趣。结果表明,目前使用的常规方案之一低估了CLDOH,高估了高CLD浓度。根据这些发现,重新检查了以前对FWI环境水域的时间监测,并揭示了一些非典型值,这可能确实是由于分析偏差。这些差异要求加大力度可靠地量化CLD及其TP。
Among the numerous organochlorines (OCs) applied in the French West Indies (FWI), chlordecone (hydrated form C10Cl10O2H2; CLD) still causes major environmental pollution nowadays. A recent report revealed the unexpected presence in FWI environment of transformation products (TPs) of CLD not routinely monitored due to a lack of commercial standards. Here, we present a method for surface waters and groundwaters to analyze CLD, its main TPs (hydroCLDs, chlordecol (CLDOH), 10-monohydroCLDOH and polychloroindenes) and other OCs. We developed an SPME-GC-SIM/MS method with a PDMS-DVB fiber. Since CLDOH-d commonly used as internal standard (IS) proved unsuitable, we synthesized several IS candidates, and finally identified 10-monohydro-5-methyl-chlordecol as a satisfactory IS for CLDOH and 10-monohydroCLDOH avoiding the use of 13C-labelled analogue. LODs for CLD and its TPs varied from 0.3 to 10 ng/L, equal to or below LODs of the two laboratories, BRGM (the French geological survey) and LDA26 (one of the French Departmental Analytical Laboratories), requested in FWI pollution monitoring that used liquid-liquid extractions and advanced facilities (LLE-GC-MS/MS and LLE-LC-MS/MS methods, respectively). Then, we extended the multi-residue method to 30 OCs (CLD and its TPs, mirex, β-HCH, lindane, dieldrin, aldrin, HCB, hexachlorobutadiene, TCE, PCE) and applied it to 30 surface and ground waters from FWI. While CLD, 8- and 10-monohydroCLD, CLDOH, 10-monohydroCLDOH, dieldrin, and β-HCH were detected and quantified, pentachloroindene, another CLD TP, was sporadically found in trace levels. A comparison with BRGM and LDA26 confirmed the interest of the SPME method. Results suggested an underestimation of CLDOH and an overestimation of high CLD concentrations with one of the currently used routine protocol. In light of these findings, previous temporal monitoring of environmental waters in FWI were re-examined and revealed some atypical values, which may indeed be due to analytical bias. These discrepancies call for intensified efforts to reliably quantify CLD and its TPs.