CAJ | 학술논문

针对中草药中重金属镉含量较低,不易直接测定的问题,本文提出了以巯基棉在超声辅助条件下分离富集,催化极谱法测定中草药中痕量镉的新方法.研究发现,在超声辅助下巯基棉对草药中痕量镉具有良好的吸附作用,被吸附的镉可用醋酸和磷酸分步定量洗脱,基于此建立了超声辅助巯基棉分离富集中草药中痕量镉的方法.在最佳条件下,巯基棉对镉的富集因子为8,方法检出限为0.52 ng/mL,加标回收率为97.1%ц102%,将该方法用于麦冬和鱼腥草中痕量镉的测定,结果满意.
침대중초약중중금속력함량교저,불역직접측정적문제,본문제출료이구기면재초성보조조건하분리부집,최화겁보법측정중초약중흔량력적신방법.연구발현,재초성보조하구기면대초약중흔량력구유량호적흡부작용,피흡부적력가용작산화린산분보정량세탈,기우차건립료초성보조구기면분리부집중초약중흔량력적방법.재최가조건하,구기면대력적부집인자위8,방법검출한위0.52 ng/mL,가표회수솔위97.1%ц102%,장해방법용우맥동화어성초중흔량력적측정,결과만의.
Directly determination of cadmium in chinese herbs is very difficult due to its low con-tent. To solve this problem, a method for determination of trace cadmium in Chinese herbs by cata-lytic polarography after separation and enrichment using sulfhydryl cotton with ultrasonication assis-tant was present. It was found that sulfhydryl cotton was of good performance in adsorption of trace cadmium in herbal medicine with ultrasonication assistant;the absorbed cadmium could be quantita-tively eluted from sulfhydryl cotton using acetic acid and phosphoric acid, respectively. Based on this, a new method for catalytic determination of trace cadmium in Chinese herbs was proposed. Un-der the optimum experimental conditions, the enrichment factor was 8 after separation and enrich-ment with ultrasonication assistant and using sulfhydryl cotton. The detection limit was 0. 52 ng/mL, standard addition recovery is 97. 1% ц97. 1%. This method was used to determination of trace cad-mium in ophiopogon and cordate houttuynia with satisfactory results.