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Let R be an(α,δ)-compatible ring.It is proved that R is a 2-primal ring if and only if for every minimal prime ideal P in R[x;α,δ] there exists a minimal prime ideal P in R such that P = P [x;α,δ],and that f(x) ∈ R[x;α,δ] is a unit if and only if its constant term is a unit and other coefficients are nilpotent. 相似文献
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顶空毛细管气相色谱法测定氯雷他定中9种有机溶剂的残留量 总被引:1,自引:0,他引:1
提出了顶空毛细管气相色谱法测定氯雷他定中乙醚、异丙醇、乙腈、叔丁醇、乙酸乙酯、四氢呋喃、环己烷、三乙胺和甲苯的残留量.采用DB-624毛细管柱(30 mX0.53 inIil,3μm),程序升温,以N、N二甲基甲酰胺(DMF)为溶剂,9种溶剂的平均回收率分别为98.2%,98.8%,106.0%,99.0%,97.7%,95.4%,95.1%,93.O%,100.6%,检出限分别为0.056,0.67,0.61,0.45,0.33,0.16,0.041,0.28,0.20 mg·L-1,测定限分别为0.17,2.0,1.9,1.1,1.1,0.54,0.13,0.90,0.69 mg·L-1. 相似文献
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