悬浮液进样-火焰原子吸收光谱法测定聚丙烯中微量元素
Metallurgical Analysis(2008)
Abstract
以乳化剂OP作样品润湿剂,以琼脂溶液作悬浮剂,将过200目(筛孔尺寸76μm)聚丙烯样品粉末悬浮在OP-琼脂溶液中制成悬浮液,用火焰原子吸收光谱法成功地测定了聚丙烯中微量钠、钾、铁、镁、锌。加入适量盐酸能显著提高铁、镁、锌的吸光度,以Sr2+作为镁的释放剂、以Li+作为钠、钾的消电离剂。并对悬浮剂和参比溶液的选择、各种影响因素进行了考察。方法用于聚丙烯中微量元素的测定,结果与灰化法一致,相对标准偏差小于5.6%,相对误差小于±4.4%。
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Key words
suspension samping,flame atomic absorption spectrometry,micro element,polypropylene
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