Filtration apparatus comprising a filtration device and a liquid receptacle for holding a liquid sample, the liquid receptacle having a closed end for holding said liquid sample, the filtration device comprising: a plunger body made of a first material, the plunger body comprising an internal chamber; a filter material; and a filtrate receptacle within the internal chamber of the plunger body, the filtrate receptacle being made of a second material, the second material being different from the first material, wherein the filtration device is arranged to be slidably movable in the liquid receptacle so that the filter material moves towards said closed end of the liquid receptacle, wherein said movement causes liquid held in said liquid receptacle to pass through said filter material to the internal chamber of the plunger body, thereby filtering the liquid, the filtered liquid passing into said filtrate receptacle, the device being characterised: in that one or more conduits are provided, fluidically connected to said filter material to receive filtered liquid sample therefrom, the one or more conduits being arranged such that filtered liquid passing therethrough is collected in said filtrate receptacle; in that the filtrate receptacle comprises an open end and an opposing closed end, the closed end being located facing said filter material, and the one or more conduits extend around a periphery of the filtrate receptacle, thereby fluidly connecting the filter material to said open end, in that said one or more conduits comprise one or more channels in an internal wall of the plunger body, and in that each of said one or more channels comprises an opening arranged to provide liquid to said filtrate receptacle during said movement, the opening being angled inward from the internal wall so as to direct liquid towards the open end of the filtrate receptacle. a plunger body made of a first material, the plunger body comprising an internal chamber; a filter material; and a filtrate receptacle within the internal chamber of the plunger body, the filtrate receptacle being made of a second material, the second material being different from the first material, wherein the filtration device is arranged to be slidably movable in the liquid receptacle so that the filter material moves towards said closed end of the liquid receptacle, wherein said movement causes liquid held in said liquid receptacle to pass through said filter material to the internal chamber of the plunger body, thereby filtering the liquid, the filtered liquid passing into said filtrate receptacle, in that one or more conduits are provided, fluidically connected to said filter material to receive filtered liquid sample therefrom, the one or more conduits being arranged such that filtered liquid passing therethrough is collected in said filtrate receptacle; in that the filtrate receptacle comprises an open end and an opposing closed end, the closed end being located facing said filter material, and the one or more conduits extend around a periphery of the filtrate receptacle, thereby fluidly connecting the filter material to said open end, in that said one or more conduits comprise one or more channels in an internal wall of the plunger body, and in that each of said one or more channels comprises an opening arranged to provide liquid to said filtrate receptacle during said movement, the opening being angled inward from the internal wall so as to direct liquid towards the open end of the filtrate receptacle.