Abstract

Ahmed Saleh Farhood¹, Luma Ahmed Mohammed Ali¹ and Firas Fadhel Ali²

DOI : http://dx.doi.org/10.13005/ojc/330246

Flow injection unit with merging zone technique was designed for aniline blue determination spectrophotometrically. This unit consists of a valve was designed for dye injection. The scope of the study is to find the optimum conditions :volume of sample, flow rate of carrier, dead volume, dispersion coefficient and  reproducibility. They found 117µl, 4.3 ml/min, zero dead volume, 2.62 and high reproducibility for six times respectively. The range of aniline blue concentration by flow injection analysis was 0. 1 – 8 ppm and detection limit 0.1 with R²= 0.9952  and 0.01 – 16  ppm for spectrophotometric method with R²=0.9947 with detection limit 0.01.

merging zone; valve; aniline blue; dead volume; dispersion; reproducibility

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