A NEW DEVICE FOR IN-SITU PORE-WATER SAMPLING

A new prototype pore-water sampler is proposed which allows temporal s ampling of pore-water from intertidal sediments. The system consists o f a nylon device provided with regularly spaced chambers, double filte ring ports and pipes for in-situ sample recovering. The field use of t his apparatus for determining sulfur species in pore-waters is describ ed; a satisfactory agreement between data obtained by using the propos ed in-situ sampler and by core-squeezing in proper experimental condit ions is found. Finally, advantages and differences with respect to oth er in-situ samplers are critically evaluated.