LK植物液杀灭微生物效果的试验观察

EXPERIMENTAL OBSERVATION ON GERMICIDAL EFFICACY OF LK PLANT SOLUTION

ＬＫ植物液系山楂成熟果实的浅黄色果核经水煎煮提取，静置 ２４ ｈ 过滤后的淡黄色透明滤液，ｐＨ ２．２８ 含多种有机酸和酚类化合物。采用载体定量杀菌试验，观察其杀灭微生物效果。结果，ＬＫ植物液 １：１稀释液对布片上金黄色葡萄球菌、大肠杆菌作用５ｍｉｎ，其原液对布片上白色念珠菌作用５ｍｉｎ，杀灭率均为１００％。染布片菌悬液中含５０％小牛血清时，杀菌作用时间需延长１倍。其原液于５４℃存放１４ｄ，杀菌效果无明显变化。该剂为稳定性较好而杀菌作用受有机物影响的植物消毒剂。

LK Plant Solution is a light yellow transparent filtrate of water decoction of the light yel- low kernel of the ripe fruit of Fructus Crataegi after the decoction was laid aside for 24 hours. It has a pH of 2.28 and contains a variety of organic acids and phenols. Carrier quanti- tative germicidal test was used to observe its germicidal efficacy. The results showed that the killing rates of Staphylococcus aureus and Escherichia coli on the cloth strips exposed to the 1:1 dilute solution of LK Plant Solution for 5 min and Candida albicans on the cloth strip exposed to the stock solution of LK Plant Solution for 5 min were 100%. Presence of 50% calf serum in the bacterial suspension contaminating the cloth strips caused 2-fold pro- longation of the time required for killing the bacteria（fungi). The germicidal effcacy of its stock solution did not change significantly after storing at 54℃ for 14 days. LK Plant Solu- tion is a plant disinfectant with good stability, but its germicidal efficacy is influenced by the organic substances.