Photometric determination of micro amount of silver with 5-Br-PADAP -SLS as chromogenic agent in Pyrite was studied.The complex has maximum absorption at 550 nm with a molar absorption coefficient of 6.5 x 104. The calibration curve is linear in the range of 0-1.6 ppm at pH 5.5-8. The int- erference of fifty foreign ions were tested. The range of detection is O.x- x×10-3 % for silver.