摘要
将土样5.00g加入0.5mol·L^(-1) NaHCO_3溶液50.0mL中,在20~25℃下振荡提取30min,用中速定量滤纸过滤,分取滤液5.0mL,加入1.0mol·L^(-1) HCl溶液5mL稀释后,采用电感耦合等离子体原子发射光谱法测定其中的有效磷和有效硫,分析谱线为P 214.914nm和S 182.034nm。磷和硫的质量浓度均在10.0mg·L^(-1)以内与发射强度呈线性关系,检出限(3s)分别为0.15,0.29mg·kg-1。加标回收率在95.2%~107%之间,测定值的相对标准偏差(n=12)在2.0%~3.6%之间。方法用于测定石灰性土壤中的有效磷和有效硫,结果与林业标准方法的测定结果一致。
The soil sample（5.00 g）was added into 50.0 mL of 0.5 mol·L^（-1） NaHCO_3 solution and was extracted by oscillation at 20-25 ℃ for 30 min.After the solution was filtered with medium-speed quantitative filter paper,5 mL of 1.0 mol·L^（-1） HCl solution was added in to 5.0 mL of the filter solution.The available phosphorus and available sulfur in the solution were determined by ICP-AES at P 214.914 nm and S 182.034 nm,respectively.Linear relationship were found between the emission intensity and the mass concentration of phosphorus and sulfur within 10.0 mg·L^（-1）,with detection limit（3 s）of 0.15,0.29 mg·kg^（-1） for available phosphorus and available sulfur respectively.Recovery rates obtained by standard addition method were in the range of 95.2%-107%,and RSDs（n=12）were in the range of 2.0%-3.6%.The poposed method was used to determined available phosphorus and available sulfur in calcareous soil,giving results in agreenment with those obtained by forestry standard method.
出处
《理化检验（化学分册）》
CSCD
北大核心
2017年第12期1407-1411,共5页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
