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Enhancing the ICP-OES detection of lead by incorporating chemical additives

Author(s): R.Ganeshjeevan, F.Vinothini, S.Suresh, S.Raja

ICP-OES emission spectrophotometry is an effective technique for the detection of metals in various samples. However the sensitivity of ICPOES for lead requires improvement. Studies were done with usage of oxidizers and other additives to improve lead by hydride reaction but this present study found the influence of an oxidizing agent without any hydride reaction. In this attempt, three different oxidizers comprising hydrogen peroxide – nitric acid, vanadium pentoxide – nitric acid and potassium permanganate – nitric acid were compared. Then the influencing oxidizer and its reaction conditions were optimized. The proposed method was also applied for the detection of lead in various real samples like old paint scraps, plastic toys and food packaging material. The results revealed that the maximum amount of lead (23.84 mg/g) was present in old paint scraps among the analyzed samples.

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