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Study on the chromogenic reaction of ironII with reagent 4-(2-benzothiazolylazo)-1,2,3-trihydroxybenzene and its application

Weixing Ma

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Abstract

The chromogenic reaction of iron? with a new reagent 4-(2-benzothiazolylazo)1,2,3-trihydroxybenzene(BTATB) has been studied by spectrophotometry in detail.The results show that in the buffer solution medium of pH 8.0～9.0,iron? reacts with BTATB to form a stable blue complex(1∶3).The maximum absorption of this complex is at 650 nm with an apparent molar absorptivity of 6.44×10~4 L· mol~(-1)·cm~(-1).Beer′s law is obeyed in the range of 0～25 μg/25 mL for iron?.The proposed method has been applied to the direct determination of iron in aluminium and its alloy standard samples and the results are in agreement with the certified value.

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What this paper is about

The chromogenic reaction of iron? with a new reagent 4-(2-benzothiazolylazo)1,2,3-trihydroxybenzene(BTATB) has been studied by spectrophotometry in detail.The results show that in the buffer solution medium of pH 8.0～9.0,iron? reacts with BTATB to form a stable blue complex(1∶3).The maximum absorption of this complex is at 650 nm with an apparent molar absorptivity of 6.44×10~4 L· mol~(-1)·cm~(-1).Beer′s law is obeyed in the range of 0～25 μg/25 mL for iron?.The proposed method has been applied to the direct determination of iron in aluminium and its alloy standard samples and the results are in agreement with the certified value.

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Available abstract

The chromogenic reaction of iron? with a new reagent 4-(2-benzothiazolylazo)1,2,3-trihydroxybenzene(BTATB) has been studied by spectrophotometry in detail.The results show that in the buffer solution medium of pH 8.0～9.0,iron? reacts with BTATB to form a stable blue complex(1∶3).The maximum absorption of this complex is at 650 nm with an apparent molar absorptivity of 6.44×10~4 L· mol~(-1)·cm~(-1).Beer′s law is obeyed in the range of 0～25 μg/25 mL for iron?.The proposed method has been applied to the direct determination of iron in aluminium and its alloy standard samples and the results are in agreement with the certified value.

Key concepts: Chromogenic, Molar absorptivity, Reagent, Spectrophotometry, Chemistry, Buffer solution, Color reaction, Absorption (acoustics)

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Study on the chromogenic reaction of ironII with reagent 4-(2-benzothiazolylazo)-1,2,3-trihydroxybenzene and its application — Research Paper | ScholarLens