【摘要】：以LY/T 1240—1999規(guī)定方法為基本依托,分別對比等離子體發(fā)射光譜(ICP-AES)與中和滴定法、不同土液質(zhì)量體積比(1∶50和1∶25)、不同稱樣量(5 g和2 g)對土壤交換性鋁測定結(jié)果的影響。結(jié)果顯示:ICP-AES與中和滴定法的測定結(jié)果無顯著差異(P0.05);1∶25土液質(zhì)量體積比下測得的土壤交換性鋁含量極顯著(P0.01)低于1∶50土液比;采用ICP-AES法測定時(shí)的土樣稱樣量可由標(biāo)準(zhǔn)中規(guī)定的5 g減少至2 g。土壤交換性鋁ICP-AES法測定的最佳分析譜線波長為396.1 nm,標(biāo)準(zhǔn)曲線的鋁濃度范圍為0~50 mg·L~(-1),鋁檢出限、定量限和回收率分別為0.050 mg·L~(-1)、0.168 mg·L~(-1)和98%。
[Abstract]:Based on the LY/T 1240-1999 method, the plasma emission spectrum (ICP-AES) and neutralization titration were compared, and the volume ratios of different soil solutions (1:50 and 1:25) were compared. Effects of different sample sizes (5 g and 2 g) on the determination of exchangeable aluminum in soil. The results showed that there was no significant difference between ICP-AES and neutralization titration (P0.05), the content of exchangeable aluminum in soil measured at 1:25 (P0.01) was significantly lower than that of 1:50. The amount of soil sample measured by ICP-AES method can be reduced from 5 g to 2 g. The optimum analytical wavelength of 396.1 nm, standard curve for determination of soil exchangeable aluminum by ICP-AES is 0 ~ 50 mg L ~ (-1). The detection limit, quantitative limit and recovery rate of aluminum are 0.050 mg L ~ (-1), respectively. 0.168 mg L ~ (-1) and 98 ~ (-1).
【作者單位】： 浙江省農(nóng)業(yè)技術(shù)推廣中心;
【分類號】：S151.95

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