【摘要】：土壤有效鉬含量測(cè)定對(duì)評(píng)價(jià)土壤鉬對(duì)作物的有效性和土壤鉬供應(yīng)水平具有重要意義。目前常用極譜法和石墨爐原子光譜法測(cè)定土壤有效鉬,但因操作復(fù)雜,多有不足和不便。采用草酸-草酸銨溶液浸提土壤有效鉬,不經(jīng)分離與富集,采用電感耦合等離子體質(zhì)譜儀He碰撞模式測(cè)定浸提液中鉬(95Mo),以103Rh為內(nèi)標(biāo)元素。結(jié)果表明:方法檢出限為1.02μg/L;2個(gè)國(guó)家土壤標(biāo)準(zhǔn)物質(zhì)(GBW07413a黃潮土和GBW07416a紅壤)有效鉬的測(cè)定值與標(biāo)準(zhǔn)確認(rèn)值一致;加標(biāo)回收率在95.1%~152%之間;對(duì)5個(gè)土壤樣品分別重復(fù)測(cè)定6次,相對(duì)標(biāo)準(zhǔn)偏差小于8%。結(jié)論認(rèn)為電感耦合等離子體質(zhì)譜儀He碰撞模式可以用于測(cè)定草酸-草酸銨浸提的土壤有效鉬,該方法測(cè)定結(jié)果準(zhǔn)確,重現(xiàn)性好,快速方便。
[Abstract]:The determination of effective soil content of soil is of great significance to the evaluation of soil fertility and the availability of soil. At present, the method of polarography and the atomic spectrum of graphite furnace is used to determine the effective amount of the soil, but because of the complex operation, there are many defects and inconveniences. The solution of oxalic acid-oxalic acid is used to extract the active carbon of the soil, and the extraction liquid (95Mo) is determined by the He-collision mode of the inductively coupled plasma mass spectrometer without separation and enrichment, and 103Rh is the internal standard element. The results showed that the detection limit of the method was 1.02. m u.g/ L, the measured value of soil standard substance (GBW07413a, and GBW07416a red soil) in two countries was consistent with the standard confirmation value, the recovery of the spike was 95.1% ~ 152%, and the relative standard deviation was less than 8% for 5 soil samples. It is concluded that the He-collision mode of the inductively coupled plasma mass spectrometer can be used to determine the effective rate of the soil in the oxalic acid-oxalic acid leaching, and the method has the advantages of accurate measurement result, good reproducibility and rapid and convenient determination.
【作者單位】： 中國(guó)農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與農(nóng)業(yè)區(qū)劃研究所/農(nóng)業(yè)部植物營(yíng)養(yǎng)與肥料重點(diǎn)實(shí)驗(yàn)室/耕地培育技術(shù)國(guó)家工程實(shí)驗(yàn)室;
【基金】：中央級(jí)公益性科研院所基本科研業(yè)務(wù)費(fèi)專項(xiàng)(Y2017PT14) 國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFD0200108)
【分類號(hào)】：S153.6

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