A new ternary surfactant proposal is studied as an extraction strategy for nano amount determination of platinum using tenoxicam (I) or piroxicam (II) as a selective chromogenic reagent in presence of PONPE 5.0 as nonionic surfactant at pH 3.5 has been developed. The analyte was investigated in the enriched solution by spectrophotometry. After examination and optimization of the complexation and extraction conditions, an enrichment factor superior to 500-fold was achieved with improved sensitivity of 342 and 427 using I and II, respectively, times more than the conventional extraction system using only a nonionic surfactant. In the acetonitrile medium, the molar absorptivity of the complex was 4.89 × 105 and 4.45 × 105 L mol−1 cm−1 at 474 and 482 nm using I and II, respectively. Beer's law is obeyed in the concentration range of 5.0–300 ng mL−1, whereas the optimum range was 15 –275 ng mL−1 using Ringbom method. The relative standard deviation (RSD) for 150 ng mL−1 Pt4+ was 1.67 and 1.32%, respectively. In the original samples, The attained detection and quantification limits amounted to 1.55 and 4.85 using I and 1.42 and 4.50 ng mL−1 using II. The proposed procedure was applied successfully for Pt4+ determination content in environmental samples such as geological, food and waters samples with excellent results.