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在含铅、镉的试液中加入pH=5.72乙酸-乙酸钠缓冲溶液3.20 mL,泵的转速恒为5 mL/min,用自制的强酸性阳离子交换树脂柱对试液中的铅、镉在线富集150 s,1.50 mol/L HNO3溶液洗脱20 s,火焰原子吸收法测定铅、镉的含量。该方法的线性范围分别是0~80.0μg/L、0~40.0μg/L,检出限分别为3.0μg/L、1.0μg/L,富集倍数分别为40倍、35倍。用该方法测定地表水中铅、镉的含量,结果满意。
Lead in cadmium test solution was added pH = 5.72 acetic acid - sodium acetate buffer solution 3.20 mL, the pump constant speed of 5 mL / min, with homemade strong acid cation exchange resin column on the test solution of lead and cadmium online The enrichment of 150 s, 1.50 mol / L HNO3 solution for 20 s, the determination of lead and cadmium by flame atomic absorption spectrometry. The linear range of the method was 0 ~ 80.0μg / L, 0 ~ 40.0μg / L, the detection limits were 3.0μg / L, 1.0μg / L, the enrichment fold were 40 times, 35 times. The method was used to determine the content of lead and cadmium in surface water with satisfactory results.