“…4 Also, the determination of lead(II) has been widely done in various systems such as in human and artificial teeth blood, 5,[6][7][8] urine, 8,9 cookies, 10 baker's yeast, 11 ashes, coals, sediments, sludge, soils, freshwaters, [2][3][4][5][6][7][8][9][10][11][12] drugs, 13 human hair, 14 wine, 1 seawater and minerals, [15][16][17] using different classical and instrumental techniques. [18][19][20][21][22][23][24][25][26] One of the classical noninstrumental methods of preconcentrating samples which we have applied in our study is floatation. It is a well known technique for selective separation of valuable substances from ores, minerals and ect, 27-29 but today this technique is used mainly in other fields of chemical engineering and more rarely in analytical chemistry also.…”