Abstract The extraction of lipophilic wood extractives from pulp and paper process waters proves to be a challenging task, due to harsh and alternating process and sample conditions. This study has determined the potential use of polymeric sorbents for solid-phase extraction (SPE) and compared to classical silica-based reversed-phase packed columns, with polymeric hydrophilic-lipophilic balanced (HLB) cartridges being the sorbent with the most potential. Recovery functions were obtained with an internal standard mixture representative for the main lipophilic wood extractive groups, which are fatty acids and alcohols, sterols, sterol esters and triglycerides. The impact of pH, sample volume and sample matrix, expressed as TOC and cations, on the retention behavior of lipophilic extractives during SPE of industrial samples were determined with polymeric HLB sorbent. High variations in the composition of pulp mill matrices led to different optimal extraction conditions. Thus, a new SPE protocol was developed, which bypasses matrix interferences and omits the loss of analytes due to sample preparation. The method is applicable to different pulp mill effluents with large discrepancies in pH and sample matrices, resulting in recoveries >90 % with RSD <5 % for all lipophilic wood extractives.

中文翻译：

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一种固相萃取方法，可消除复杂制浆厂流出物的基质效应，用于分析亲油性木材提取物

摘要 由于苛刻和交替的工艺和样品条件，从纸浆和造纸工艺水中提取亲油性木材提取物被证明是一项具有挑战性的任务。本研究确定了聚合物吸附剂在固相萃取 (SPE) 中的潜在用途，并与经典的基于硅胶的反相填充柱进行了比较，其中聚合物亲水亲油平衡 (HLB) 小柱是最具潜力的吸附剂。使用代表主要亲脂性木材提取基团的内标混合物获得了回收函数，这些基团是脂肪酸和醇、甾醇、甾醇酯和甘油三酯。pH、样品体积和样品基质的影响，表示为 TOC 和阳离子，使用聚合 HLB 吸附剂测定工业样品 SPE 过程中亲脂性提取物的保留行为。纸浆厂基质组成的高度变化导致不同的最佳提取条件。因此，开发了一种新的 SPE 方案，它绕过了基质干扰并忽略了由于样品制备而造成的分析物损失。该方法适用于 pH 值和样品基质差异较大的不同制浆厂废水，所有亲油性木材提取物的回收率 >90%，RSD <5%。