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The absorption-photometric determination of iron in tobacco with CTMAB

Hong Liu, Yali Huang

Abstract

In the presence of CTMAB, sulfosalicylic acid reacts with Fe(Ⅲ) in ammonia-ammonium chloride buffer solution to form a stable yellow complex(mole ratio Fe∶R=1∶3), whose absorption maxima is 420 nm. Beer's law was obeyed in the range of 0～20 μg of Fe(Ⅲ) per 25 mL of solution with its apparent molar absorptivity of 5.30×10~(4)L·mol~(-1)·cm~(-1). Based on the facts mentioned above, a new absorptionphotometric method for the determination of Fe in tobacco was established.

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Available abstract

Key concepts: Molar absorptivity, Sulfosalicylic acid, Chemistry, Absorption (acoustics), Buffer solution, Ammonia, Nuclear chemistry, Analytical Chemistry (journal)