样品经草酸-草酸铵浸提,不经分离富集,振荡0.5h后放置过夜,干过滤后采用电感耦合等离子体-质谱法直接测定土壤中的有效钼。方法检出限(3s)为0.015μg/g,RSD(n=12)为2.91%—06.41%。经国家一级标准物质验证,测定值与标准值基本一致。 The sample was extracted by oxalic acid-ammonium oxalate without enrichment. After shaking for 0.5h, the sample was allowed to stand overnight. After filtration, the available molybdenum in the soil was directly determined by inductively coupled plasma-mass spectrometry. The method detection limit (3s) was 0.015μg / g, RSD (n = 12) was 2.91% -06.41%. The national standard material verification, the measured value is basically the same with the standard value.