摘要
本文提出在α-联糠肟-乙二胺—亚硝酸钠—盐酸羟胺—氯化铵体系中连续测定铬、锌、钴、镍四元素的极谱催化波,波峰敏锐,波形良好,铬浓度在0.0005—0.5μg/15m1,锌0.1—30μg/15ml,钴0.0005—1μg/25ml,镍0.01—4μg/25ml范围内浓度和峰高呈线性关系。当铬1ppb,锌70ppb,钴15ppb,镍22ppb时,相对标准偏差分别为4.5％,5.8％,3.5％,5.1％。
Continuous determination of the catalytic polarographic wave of chromium, zinc, cobalt and nickel in a-furildioxime-diaminoethane-nitronatrium-hydrazine chloride-ammonia chloride system was given. The wave peaks are sharp, and the wave shapes are fine. The peak potential is at -1.65V, -1.25V, -0.85V, -0.73V, respectively. When the concentration ranges within 0.0005—0.5μg/15ml (Cr), 0.1—30μg/15ml (Zn), 0.0005—1μg/25ml (Co), 0.01—4μg/ml (Ni), the concentration is linear with Peak height. The lower detection limits are: Cr 40 ppt, Zn 9.6 ppb, Co 40 ppt, Ni 1 ppb. For Cr 1 ppb, Zn 70 ppb, Co 15 ppb, and Ni 22 ppb, the coefficients of variations are 4.5％, 5.8％, 3.5％, 5.1％, separately.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1989年第7期629-631,共3页
Chinese Journal of Analytical Chemistry
关键词
极谱催化法
铬
锌
钴
镍
Catalytic polarography
Chromium
Zinc
cobalt
Nickel
