The standing preacher curls will target your biceps.
Muscles Involved in order of importance:
Hold the bar about shoulder width apart with your palms facing up(an under hand grip)
Hold the bar out at arms length and curl the bar up towards your shoulders.
Then lower the weight back down to the starting posistion while resisting the weight and not just letting it fall back to the starting posistion.
Safety: Doing this exercise should be done with a spotter if you think the weight will be a bit too much, I also have a spotter when doing this exercise just to be on the safe side.