极谱法测定土壤和植株钼的条件选择

Selection of Conditions for Determination of Soil and Plant Molybdenum by Polarography

土壤和植株中的钼是含量很低的化学元素,定量分析检出范围是pp^m-pp^b数量级,采用极谱法分析可获得满意的结果.钼的极谱效应是在硫酸—苯羟乙酸—氯酸钾底液体系中进行,影响极谱行为的因素很多.本试验着重研究土壤和植株中钼的测定条件,经过田间试验和盆栽试验样品检验,相关性良好.现己在生产和科研上运用.

Molybdenum exists in soil and plants at very low levels. Its quantitative detection is in the range from ppm to ppb. Satisfactory results can be obtained by the use of polarography. Polarographic effect of molybdenum is going on in the background solution system containing sulphic acid, amygdalic acid, and potassium chlorate, and is affected by many factors. In this experiment, the conditions for the determination of molybdenum in soil and plants have been mainly studied. Sample tests from field and pot culture showed good correlation. This method is now adopted in production and scientific research.