Four vials are required to complete this course. Use isocratic test mix part number 01080-68704. For the high standard: dilute 1 mL of test mix to 10 mL. For medium standard: dilute 3 mL of high standard to 10 mL. For low standard: dilute 1 mL of high standard to 10 mL. For Sample: dilute 5 mL of high standard to 10 mL