Slurry analysis by multichannel arc/spark emission spectrometry using a monosegmented system: Determination of aluminium in sediments
✍ Scribed by C. E. C. Magalhães; C. Pasquini; M. A. Z. Arruda
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 180 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0895-7533
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✦ Synopsis
This work proposes a new approach for sediment analysis in which the sample is introduced as a slurry in an arc/spark emission spectrometer using a monosegmented system. The spectrometer has been modified to employ a 1024 photodiode-array detector capable of collecting intensities in a 18.7 nm wide wavelength window. Sediment slurries were prepared with 8.5-50 mg of the samples, grounded to a particle size less than 38 lm, transferred to a 50 mL volumetric flask in which 1 mL of conc. HNO 3 and 300 lL of 10% m/v La (as La 2 O 3 ; used as internal standard) were added. The slurry (25 lL) was introduced into the monosegmented system and transported by an air stream to a graphite rod in the existing arc/spark source. About 40 samples can be analyzed per hour. Results for reference materials show acceptable accuracy and precision for the proposed method.