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In this report, a simple and practical procedure is proposed for DNA localization on a solid matrix e.g., a collection swab. The approach is straightforward and employs spectrum decomposition using a model DNA intercalator Ethidium Bromide (EtBr). The proposed approach can detect picograms of DNA in solution and nanograms of DNA on solid surfaces (swabs) without the need for PCR amplification. The proposed technology offers the possibility for developing an inexpensive, sensitive, rapid, and practical method for localizing and recoverin