Potential of Sodium Hypochlorite Solution for Seminal Stain Laboratory Examination
Rony L. Villaflores, PhD

Abstract
An experimental study on the potential of sodium hypochlorite (NaOCI) solution for seminal stain laboratory examination was conducted at University of Eastern Philippines, College of Science, Physical Sciences Department, Chemistry Laboratory. It sought to augment a dearth of laboratory materials for seminal stain analysis at the crime scene; determine the potential of sodium hypochlorite (NaOCI) solution for seminal stain laboratory examination. The analysis of semen includes dry and wet samples, n=45. Results showed that both dry and wet semen samples discolored to yellow. The suspected seminal stain samples were treated with 10%, 20% and 30% sodium hypochlorite solutions. For 30% sodium hypochlorite revealed a very yellow color. This means positive. The 20%, yellow, and light yellow for 10% respectively. The semen samples were used with increasing volume. For 30% solution was dropped onto the white cloth with 30 mL semen, for 20 % to 20 mL and 10% to 10 mL, it revealed that as the volume of the sample of semen increases, it showed a yellow color. This study was positively controlled using a compound microscope and Florence reagent, and negatively controlled using the distilled water. This would help the crime investigators and the communities better understand the corroborating of physical evidences for justice of rape victims, innocent suspects, and perpetrators. Based on the findings of the study, it is recommended to include the quantity of semen to test the change in yellowing with different percentages of the reagent.

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