Determination the levels of potassium bromate beside some heavy metals (Fe, Ni and Cu) in Tost and bread samples collected from some local markets in Al –Beida City by using spectrophotometer

Abstract

The presence high levels of potassium bromate in bread is very undesirable considering its deleterious effects and heavy metals also are implicated in carcinogenesis, mutagenesis and teratogens . In our study standard curve of potassium bromate and heavy metals ( nickel , iron and copper ) the strategy showed good linearity regression (R2 = 0.99 ). linearity of the strategy was performed during a range 1- 5 ppm of KBO3 and therefore the method showed good linearity regression (R2 = 0.97) with y=0.157x , 10 – 50 ppm of Cu (R2 = 0.99 ), with y = 0.001 x , 1- 5 ppm of Ni, with y = 0.018 x and (R2 = 0.99 ) , 1-5 ppm of Fe with y= 0 . 59 x and (R2 = 0.99 ) and Which is showing good linearity, precision, accuracy and sensitivity, which might be used for determination heavy metals . The quantity of potassium bromate bread samples ranged from 0.38 to 13.72 ppm and therefore the amount of Ni in bread ranged from 0.66 to 2. 7 ppm the quantity of Cu ranged from 5 to 41 ppm and the quantity of Fe 0.003 ppm to 0.03 ppm