api5000positive or negative polarity on an API 5000™ LCMSMS System equipped with a Turbo V™ source. Using direct injection analysis of water samples comparable results were obtained asAPI 5K API 5K means an API-defined BOP confuration with a rated working pressure of 5,000 psi and as described in API RP 53, adopted by reference at 20 AAC 25.527(c).