作者根据Cary及Allaway测定生物材料中铬的方法应用于植物中铬的分析。本法将样品经湿式消化、液-液萃取浓缩后,用原子吸收分光光度计测铬,对豌豆、谷物、甜菜根等样品中加入1微克铬的平均回收率为99±5%。方法灵敏度为20毫微克。试剂:(1) 硝酸——玻璃器中重蒸馏。(2) 2,4-戊二酮——玻璃器中蒸馏。在745毫米汞柱取135～137℃蒸馏液。(3) 甲基异丁酮(MIBK)。(4) 0.02%甲基橙。(5) 醋酸盐缓冲液——醋酸、水及NH_4OH各60毫升混合,冷却,调pH至5.8,稀释至250毫 The authors applied Chromium analysis in plants based on the method of Cary and Allaway in the determination of chromium in biological materials. The method of wet digestion of samples, liquid - liquid extraction after concentration, atomic absorption spectrophotometer for chromium, peas, grains, beetroot and other samples by adding 1 microgram of chromium was 99 ± 5% average recovery. The sensitivity of the method is 20 ng. Reagents: (1) nitric acid - glass in the redistillation. (2) 2,4-Pentanedione-glass. Take a 135 to 137 ° C distillate at 745 mm Hg. (3) Methyl isobutyl ketone (MIBK). (4) 0.02% methyl orange. (5) acetate buffer - acetic acid, water and NH 4 OH each 60 ml mixed, cooled, adjusted to pH 5.8, diluted to 250 milliseconds