机构地区: 北京师范大学
出 处: 《农业环境保护》 1994年第6期246-251,共6页
摘 要: 比较了三种提取剂:1mol/LNH_4OAc、0.005mol/LDTPA-TEA,0.1mol/L,HC1,对南北方的水稻土和灰钙土中的有效态Cd、Cu、Zn、Pb的提取率、各种相关性以及临界提取量和误差等。结果表明:北方灰钙土中有效态Cd的适宜提取剂为NH_4OAc,其次为DTPA、HC1;有效态Cu、Zn的适宜提取剂皆为DTPA,而南方水稻土中有效Cd、Cu的适宜提取剂也均为DTPA。 AbstractThe extraction efficiency,correlation and critical extraction capacityof three extractants:1mol/L NH_4OAc,0 .05mol/L DTPA-TEA,and 0.1mol/L HC1,for the available Cd,Cu,Zn and Pb in sierozem and aquorizemwere studied,The best extractant for available Cd in sierozem wasNH_4OAc,DTPA was idoal for available Cu and Zn in the same soil,Foravailable Cd and Cu in aquorizem,DTPA was the first choice