Abstract: Method and apparatus for continuous pH control of aqueous liquid systems, particularly biological and biochemical systems, by sorption of H.sup.+ and/or OH.sup.- ions with a passive ion acceptor material isolated from, but in contact with liquid of said system in a selectively permeable membrane packet. Liquid systems of interest are those with an initial pH in the range of from about 4.5 to 9.0, and the pH of the system is maintained by the invention at its initial value, or brought within, and maintained in, the range of from about 6.5 to 8.0. The ion acceptor material is selected from an inorganic, relatively water insoluble metal oxide, hydroxide, phosphate or silicate matrix which matrix is capable of maintaining a quasi-equilibrium pH state with the aqueous liquid system of interest. The matrixing metals are preferably selected from Ti, Al and B.

Abstract: Method and apparatus for continuous pH control of aqueous liquid systems, particularly biological and biochemical systems such as stored blood, by sorption of H.sup.+ andwith a passive ion acceptor material isolated from, but in contact with liquid of said system in a selectively permeable membrane packet. Liquid systems of interest are those with an initial pH in the range of from about 4.5 to 9.0, and the pH of the system is maintained by the invention at its initial value, or brought within, and maintained in, the range of from about 6.5 to 8.0. The ion acceptor material is selected from an inorganic, relatively water insoluble metal oxide, hydroxide, phosphate or silicate matrix, which matrix is capable of maintaining a quasi-equilibrium pH state with the aqueous liquid system. The matrixing metals are preferably selected from Ti, Al and B.

Abstract: This invention is directed to apparatus and a method for monitoring the collection of blood from a donor so as to minimize trauma to the blood so collected. The system closely monitors the rate of collection of blood and regulates the rate of mixing of anticoagulant therewith so as to maintain a substantially constant ratio of anticoagulant to blood throughout the collection process. The system also includes built-in warning devices for indicating when the collection process is not proceeding according to a prescribed pattern.

Abstract: Blood collection apparatus, systems and methods for minimizing the lesion of collection caused by initial high volume ratios of anticoagulant fluid to blood at the beginning of known collection processes in which blood is passed into a collection bag containing the total amount of anticoagulant fluid for the entire amount of blood to be collected. A collection bag system has a bag containing the anticoagulant fluid which is passed to a blood collection bag at a rate determined by the flow rate of the blood into the collection bag to maintain the ratio of anticoagulant to blood at a level to minimize the lesion of collection throughout the collection process. The blood collection bag is suspended by a spring from a blood bag stand and the anticoagulant bag is supported by the stand in a fixed position.