Forests emit an array of reactive volatile organic compounds (VOCs), such as alpha-pinene (C10H16), to the atmosphere. Atmospheric oxidation can produce low volatility products, which contribute to the formation and growth of atmospheric particles, in turn modulating the amount of sunlight, or precipitation that reaches the surface. The chemistry behind this particle formation process is poorly understood. We present measurements and analysis of the gas- and particle-phase composition produced from alpha-pinene ozonolysis utilizing the University of Washington (UW) Chamber, a 0.7 m3 Teflon bag. The UW Chamber was operated in continuous flow mode, where ~70 ppb of alpha-pinene and excess ozone were constantly input and products constantly sampled with an Iodide adduct High Resolution – Time of Flight – Chemical Ionization Mass Spectrometer (HR-ToF-CIMS) coupled to the Filter Inlet for Gases and AEROsols (FIGAERO). This method provides elemental composition for each detected molecule, but does not provide structural information. To address this issue we employ a voltage scanning technique where we increase the electric field strength within the HR-ToF-CIMS to induce the declustering of reagent ion-molecule clusters. This technique causes a decrease in signal for most compounds, as the reagent-ion is no longer clustered to the molecule. It is hypothesized, that if the reagent-ion is clustered to a peroxy acid group, then enhanced declustering can promote reactive charge transfer reactions of the type I-(RC(O)OOH) -> HOI + RC(O)O -. We expect to observe decrease in signal from the parent I -(RC(O)OOH) adducts accompanied by a corresponding increase in carboxylate ion(RC(O)O-) signals. The mass spectrometer is able to resolve ions that do and do not contain an Iodide, and thus we can, for the first time, quantitatively determine online and in real time, how many peroxy acid products are present and their fractional contribution to the total of observed alpha-pinene oxidation products.