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| Determination of cadmium in soil by using direct solid sampling-atomic fluorescence spectrometry method |
| Received:November 05, 2015 |
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| KeyWord:direct solid sampling;atomic fluorescence spectrometry;soil;cadmium;electrothermal vaporization |
| Author Name | Affiliation | E-mail | | ZHENG Bo | Agro-Environmental Protection Institute Ministry of Agriculture, Quality Supervision and Testing Center, MOA, Tianjin 300191, China | | | LIU Xiao-wei | Agro-Environmental Protection Institute Ministry of Agriculture, Quality Supervision and Testing Center, MOA, Tianjin 300191, China | xwliu2006@163.com | | MU Li | Agro-Environmental Protection Institute Ministry of Agriculture, Quality Supervision and Testing Center, MOA, Tianjin 300191, China | | | XU Ya-ping | Agro-Environmental Protection Institute Ministry of Agriculture, Quality Supervision and Testing Center, MOA, Tianjin 300191, China | | | DAI Li-hong | Agro-Environmental Protection Institute Ministry of Agriculture, Quality Supervision and Testing Center, MOA, Tianjin 300191, China | | | FENG Li | Beijing Titan Instruments Company Limited, Beijing 100015, China | |
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| Abstract: |
| The current methods for determining soil cadmium(Cd) require complicated pretreatments. Here we developed a method to determine soil Cd by using solid sample-atomic fluorescence spectrometry. The method avoided element loss and improved the analysis efficiency. Estimates by the Pauwels formula and Homogeneity(HE) showed that minimum of 3 mg sample with particle size less than 0.3 mm(60 mesh) met the trace sampling requirements of the instrument. The power and time of sample drying were 50 W and 30 s, and those for sample ashing 70 W and 40 s, respectively. The Ar-H2(9:1, V/V) flow rate was controlled at 800 mL·min-1. The instrument detection limit and method detection limit were 0.016 ng and 0.005 3 mg·kg-1, respectively, with the relative standard deviations less than 10%. The analysis time was less than 3 min. The results obtained by the present method was not significantly different(P >0.05) from those of ICP-MS. In conclusion, the present method is quick, simple, and sensitive, and can meet the requirements of cadmium determination in soils. |
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