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对-氨基苯磺酸钠(H_2N-C_6H_4-SO_3Na)是麦类锈病的除锈剂。能与对-二甲氨基苯甲醛显色。用分光光度法可测定敌锈钠在麦类果实中的残留量,方法简便,灵敏度高. 实验方法与讨论 1 敌锈钠标准溶液的配制:称取1.00000克分析纯对-氨基苯磺酸钠,加少量蒸馏水溶解后,移入1000毫升量瓶中稀至刻度. 2 显色剂的配制:称取1.00000克分析纯对-二甲氨基苯甲醛,加浓HCl 1.00毫升,加水稀至100.00毫升摇匀. 3 求最大吸收波长(λ_(max)):吸取敌锈钠样品5.00
Sodium p-aminobenzenesulfonate (H_2N-C_6H_4-SO_3Na) is a derusting agent for wheat rust. With p-dimethylaminobenzaldehyde color. The spectrophotometric method can be used to determine the residual amount of sodium rust rust in wheat fruit, the method is simple and has high sensitivity.Experimental methods and discussion 1 Preparation of sodium rust standard solution: Weigh 1.00000 g of analytically pure sodium p-aminobenzenesulfonate , Add a small amount of distilled water dissolved, transferred to 1000 ml volumetric flask graduated. 2 color reagent preparation: Weigh 1.00000 g of analytically pure p-dimethylaminobenzaldehyde, add concentrated HCl 1.00 ml, diluted with water to 100.00 ml shake 3. Find the maximum absorption wavelength (λ_ (max)): Absorbed sodium rust sample 5.00