火焰原子吸收光谱法测定高吸水性树脂吸肥量

FAAS Determination of Fertilizer Retention Capacity of Resin with High Hydro-absorptivity

高吸水性树脂在铜锌微肥的水溶液经吸水、溶胀、过滤,直接用火焰原子吸收光谱法测定滤液中铜、锌含量,计算出高吸水性树脂对铜、锌吸持量。相对标准偏差小于5%,加标回收率在92.1%-103.6%。

A method for the determination of fertilizer retention capacity of highly hydroabsorptive resin was reported. Resin was immersed in the solution Of the fertilizer containing micro amounts of Cu （ Ⅱ ） and Zn （ Ⅱ ）. After water absorbing and expansion, the resin was filtered, and amounts of Cu（ Ⅱ ） and Zn（ Ⅱ ） in the resin were determined by FAAS. Results of retention capacity of Cu（ Ⅱ ） and Zn（ Ⅱ ） ion by the fertilizer can be obtained via calculation. RSDs of the determination were less than 5% and recoveries were in range of 92. 1%-103. 6%.