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1999•FIA Kenkyu Kondankai kaishi/Journal of flow injection analysisRequires access

SPECTROPHOTOMETRIC DETERMINATION OF ALUMINIUM IN PLANTS DIGEST USING A FLOW SYSTEM

Luís Fernando P. Campos, Cristiane A. Tumang, Ridvan Nunes Fernandes

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Abstract

. . Summary A spectrophotometric flow injection system for the determination of aluminium in plants with xylenol orange (XO) was proposed. The flow network was designed using an injector-commutator; the samples was analyzed without any prior treatment. The interference caused by iron was suppressed using by adding potassium thiocyanate as masking. The calibration graph showed a linearity in the range of 0.1 to 10.0 rng A1 and a relative standard deviation of 0.98 % for 10 runs on 7.5 mg L Al. The accuracy was assessed by comparing the results with those obtained the atomic emission spectrometry (ICP-AES), no significant difference at 95 % confidence level was observed. Other variables, such as an analytical throughput of 45 determinations per hour; a reagent consumption of 2.0 mg of XO and 13.3 mg potassium thiocyanate (KSCN) per deterkmtion were also achieved.

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. . Summary A spectrophotometric flow injection system for the determination of aluminium in plants with xylenol orange (XO) was proposed. The flow network was designed using an injector-commutator; the samples was analyzed without any prior treatment. The interference caused by iron was suppressed using by adding potassium thiocyanate as masking. The calibration graph showed a linearity in the range of 0.1 to 10.0 rng A1 and a relative standard deviation of 0.98 % for 10 runs on 7.5 mg L Al. The accuracy was assessed by comparing the results with those obtained the atomic emission spectrometry (ICP-AES), no significant difference at 95 % confidence level was observed. Other variables, such as an analytical throughput of 45 determinations per hour; a reagent consumption of 2.0 mg of XO and 13.3 mg potassium thiocyanate (KSCN) per deterkmtion were also achieved.

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Available abstract

. . Summary A spectrophotometric flow injection system for the determination of aluminium in plants with xylenol orange (XO) was proposed. The flow network was designed using an injector-commutator; the samples was analyzed without any prior treatment. The interference caused by iron was suppressed using by adding potassium thiocyanate as masking. The calibration graph showed a linearity in the range of 0.1 to 10.0 rng A1 and a relative standard deviation of 0.98 % for 10 runs on 7.5 mg L Al. The accuracy was assessed by comparing the results with those obtained the atomic emission spectrometry (ICP-AES), no significant difference at 95 % confidence level was observed. Other variables, such as an analytical throughput of 45 determinations per hour; a reagent consumption of 2.0 mg of XO and 13.3 mg potassium thiocyanate (KSCN) per deterkmtion were also achieved.

Key concepts: Xylenol orange, Chemistry, Reagent, Potassium thiocyanate, Relative standard deviation, Thiocyanate, Analytical Chemistry (journal), Aluminium

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