Citation: Zhi Hua WANG, Min CAI, Shu Jun WANG. Determination of Iron in Layered Crystal Sodium Disilicate and Sodium Silicate by Flame Atomic Absorption Spectrometry with Boric Acid as a Matrix Modifier[J]. Chinese Chemical Letters, ;2006, 17(6): 809-812. shu

Determination of Iron in Layered Crystal Sodium Disilicate and Sodium Silicate by Flame Atomic Absorption Spectrometry with Boric Acid as a Matrix Modifier

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029

Received Date: 7 December 2005

The effects of matrix silicate and experimental conditions on the determination of iron in flame atomic absorption spectrometry (FAAS) were investigated. It was found that boric acid as a matrix modifier obviously eliminated silicate interference. Under the optimum operating conditions, the determination results of iron in layered crystal sodium disilicate and sodium silicate samples by FAAS were satisfactory. The linear range of calibration curve is 0-10.5μg.mL^-1, the relative standard deviation of method is 1.2%-2.2%, the recovery of added iron is 96.0%-101%, thesensitivity is 0.19μg·mL^-1, and deyection limit is 77 ng·mL^-1, The effect of the determination of iron of the standard curve method, standard addition calibration and colorimetry method was the same, but the first has the merits of rapid sample preparation, reduced contamination risks and fast analysis.
- Layered crystal sodium disilicate,
- sodium silicate,
- flame atomic absorption spectrometry,
- determination of iron,
- boric acid
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