CAJ | 학술논문

为建立一种快速测定食品中重金属痕量镉的新方法，以生姜为样品，碱性介质中，Cd2＋与溴化钾、邻菲罗啉反应生成多元配合物，利用共振光散射技术测定镉。结果表明：镉的最大共振散射光峰位于623．4 nm，镉的质量浓度在0～0．15μg/mL范围内与体系相对共振散射光强度有良好的线性关系，相关系数r为0．9984，检出限为0．012μg/mL；样品测定的 RSD＜3．2％（n＝5），回收率为93．2％～101．2％。该方法快速、简便、灵敏度高，为生姜中痕量镉的测定提供了参考。
위건립일충쾌속측정식품중중금속흔량력적신방법，이생강위양품，감성개질중，Cd2＋여추화갑、린비라람반응생성다원배합물，이용공진광산사기술측정력。결과표명：력적최대공진산사광봉위우623．4 nm，력적질량농도재0～0．15μg/mL범위내여체계상대공진산사광강도유량호적선성관계，상관계수r위0．9984，검출한위0．012μg/mL；양품측정적 RSD＜3．2％（n＝5），회수솔위93．2％～101．2％。해방법쾌속、간편、령민도고，위생강중흔량력적측정제공료삼고。
A new resonance light scattering (RLS)method for the rapid determination of cadmium in ginger is developed based on cadmium in alkaline medium;cadmium (Ⅱ)reacted with potassium bro-mide,1,10-phenanthroline monohydrate to generate multiple complexes,using resonance light scat-tering technique for determination of cadmium.The results show that cadmium has maximum reso-nance light scattering peak at 623.4 nm.A good liner relationship (r=0.9984)is observed between cadmium concentration within the range of 0~0.15μg/mL and relative scattered light intensity.The detection limit of cadmium is 0.012 μg/mL and the relative standard deviations (RSD)of precision (n=5)are less than 3.2%.The average recovery rates of cadmium in four kinds of ginger are 93.2%~101.2%(n=5).This method is simple,rapid and sensitive,and it has provided references for the determination of trace cadmium in ginger.