Despite widespread and its local available as a naturalized hedge and shade plant, the potential of Trichilia emetica was not utilized in soap making by the majority of local community in various parts of Dodoma, Tanzania. This study aimed to assess the quantity (yields) and quality (Acid Values (AVs), %Free Fatty Acids (%FFAs) and Saponification Values (SVs) of seed oil from water plant (T. emetica), suitable for soap making application. Solvent extraction method was used during oil extraction, where by 50gm of preheated and powdered seed materials were immersed in 250 ml of n-hexane in 1:5 (w/v) to dissolve the oil contained in the seed cake. The oil was collected by vaporizing solvent out through Rotary evaporation at 60 °C. Also standard titration methods were used to obtain SVs, AVs and %FFAs of the extracted oil. Results showed that T. emetica seeds contained higher quantity of oil (48.4%−50.2%) than many reported commercial plant seed oils. Also, the study found higher AV (7.4 mgKOH/g−7.8 mgKOH/g), %FFA (3.7% to 3.9%) and SVs (189.5 mgKOH/g − 191.4 mgKOH/g) than the maximum acceptable limits of 0.50 mg KOH/g, 0.020% and 175 mgKOH/g − 187 mgKOH/g prescribed by ASTM standards (2002). The obtained results showed that, T. emetica seeds yielded high oil quantity with low qualities due to higher levels of acidity. But high SVs guarantees the possibility of using T. emetica seed oil in soap making. However, the oil requires purification in order to bring levels of acidity to acceptable standards and guarantee its normal use in soap making.

尽管吐丝草分布广泛，并且在当地可用作天然树篱和遮荫植物，但坦桑尼亚多多马各地的大多数当地社区并未利用其潜力来制作肥皂。本研究旨在评估适合肥皂制作应用的水生植物（催吐）种子油的数量（产量）和质量（酸值 (AV)、游离脂肪酸百分比 (%FFA) 和皂化值 (SV)提取油时采用溶剂萃取法，将50克预热并粉化的种子材料按1：5（w/v）浸入250毫升正己烷中，溶解种子饼中所含的油。通过在 60 °C 下旋转蒸发蒸发溶剂来收集，并使用标准滴定方法获得提取油的 SV、AV 和 %FFA。结果表明，催吐种子含有较高量的油（48.4%−50.2%） ）比许多报道的商业植物种子油。此外，研究发现更高的 AV（7.4 mgKOH/g−7.8 mgKOH/g）、%FFA（3.7% 至 3.9%）和 SV（189.5 mgKOH/g − 191.4 mgKOH/g）高于 ASTM 标准 (2002) 规定的最大可接受限值 0.50 mg KOH/g、0.020% 和 175 mgKOH/g − 187 mgKOH/g。所得结果表明，由于催吐种子出油量高，质量低。达到更高的酸度。但高 SV 保证了催吐籽油用于肥皂制造的可能性。然而，这种油需要纯化，以使酸度达到可接受的标准，并保证其在肥皂制造中的正常使用。