[Study on the determination of free iron oxide in soil extract by FIA-ICP-AES].
Free iron oxide in soil extract is determined by flow injection analysis-inductively coupled plasma-atomic emission spectrometry. The effects of the volume of the loading sample and the concentration of the extractants(NH2OH.HCl,H2C2O4) were investigated. When 50 microL sampling ring is selected and the concentration of two extractants is controlled under 10 mg.mL-1, sprayer nozzle is not blocked and feeding is smooth, the background interference is checked effectively as well. The recoveries of standard addition are 97.6%-100% with precision 2.3%-3.5% RSD(n = 5).
Gong
Q
Q
College of Chemistry and Chemical Engineering, Guangxi University, 530004 Nanning.
Wei
X
X
Zhang
X
X
Yi
N
N
Wu
J
J
D005290:Ferric Compounds / Q000032:analysis*; D017022:Flow Injection Analysis; D012987:Soil / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods
D005290:Ferric Compounds; D012987:Soil; C000499:ferric oxide