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shi mo lu yuan zi xi shou fa ce ding ren fa zhong hen liang meng
Pages: 57-65
Year: Issue:  3
Journal: Acta Scientiarum Naturalium Universitatis Neimongol

Keyword:  石墨炉原子吸收法测定痕量锰人发锰测定气流量微量锰发样微量元素分析结果精确测定;
Abstract: Weigh exactly 30mg sample of human hair,place in a silica beaker,add 1.00 ml of 1:1 HNO_3 and put on a water bath,dissolve carefully,then evaporate to dryness.Redissolve in a few drops of 0.5% HNO_3,transfer to a 10ml Nessler tube and make up to volume with 0.5% HNO_3. The optimum operation conditios are as follows: Drying time 15 sec.Current 40 Amp. Ashing time 5 sec.Current 60 Amp. Atomizing time 5 sec.Current 240 Amp. Inner inert gas flow 0.5l/min Outer inert gas flow 1.5l/min Ware length 2794.8 Slit width 1.9 H.C.L,Current 10 mA Recorder full-scale 20mv. The advantages of this method are without the need for extensive sample pretreatment, easy operation and high sensitivity.Absolute detection limit is 5.6×10~(-12)g(3kσ) Mn in human hair. The data of this paper indicate τ_A=0.495,τ_R=0.750,τ_A/τ_R=0.660 and N/N_0=0.812 in terms of This method is satisfactory.
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