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fann PHPA Instruction Sheet
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1PHPA Adapter (HPK Test)Instruction SheetWATER BASED FLUID TEST PROCEDURE1) Pre-heat HTHP jacket to 285 ºF2) Dry HTHP Cell; Insert and tighten stem valve; Invert and place in stand3) Add amount of sample (typically 5 mL)4) Add DI water (55 mL)5) Add 5 mL NaOH (5N); Put lid on and lock in place with set screws6) In PA apparatus add 30 mL Boric Acid (3% aq. soln.) and 6 drops bromocresol green- methyl redindicator (should be a pink color)7) Place HTHP cell in heating jacket, keeping the cell inverted8) Place PA apparatus on cell, and lock in place with pin9) Carefully open stem-valve one-quarter turn so that pressure can be released from cell.10) After first bubble appears in HPK boric acid solution, start a 30 min. timer.11) After 30 min. close stem-valve and lift cell out of the jacket.12) Carry out titration in titration bowl using N/50 H2SO4 (solution should turn from dark green tored/pink color)13) Calculate ppb PA from calibration curve.14) Clean-up is simply done by washing cell and PA apparatus with tap water.Notes:1) Calibration should be carried out with samples containing the equivalent of 1 ppb, 2 ppb, 4 ppb,8 ppb PA. Individual calibration curves should be determined for different additives (e.g., PHPA,CLAY GRABBER, CLAY SYNC etc…)2) If more than 30 mL of acid is required, test should be redone with 2.5 mL of sample, and 57.5mL of DI water. |
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