摘要:
A stable control solution is provided for the determination of urobilinogen. The control solution comprises an aqueous solution of about 3-12% ethylene glycol, about 0.1% protein and preferably about 40-400 mg/dl urobilinogen, said composition buffered to pH about 8.0-9.0 and retained in a hermetically sealed container under a blanket of inert gas.
摘要:
A hematology control is disclosed which is useful for clinical hematology procedures and, in particular, mean corpuscular volume (MCV) determinations. The hematology control comprises an aqueous suspension of red blood cells in which varying levels of MCV are provided by applying to the red cell component, after light treatment with aldehyde, an osmotic pressure that is directly proportional to the desired red blood cell size.
摘要:
A stable blood serum conjugated bilirubin reference composition characterized in that the composition possess a pH of from about 8.2 to bout 9.2 and comprises (a) a sulfhydryl compound in an amount sufficient to enhance the stability of the conjugated bilirubin and (b) a chelating agent in an amount sufficient to bind all the metals present in the blood serum moiety of the composition. This blood serum conjugated bilirubin composition when stored in a gas impervious vial under an inert atmosphere has an excellent shelf life.
摘要:
A freeze-stable liquid blood control standard and method is provided for the quality control of the measurement of blood pH and gases in the clinical laboratory. The blood control standard comprises a sealed receptacle containing specially treated red cells and a gaseous head space at least equal to about the volume of the red cells. The special treatment comprises thorough washing and separating the red cells from the plasma components and mild treatment with aldehyde, slow admixture with lower aliphatic diol or triol, and retention in a buffered solution. The special treatment optionally includes treating at least a portion of the red cells with carbon monoxide. The head space comprises from 0-15% CO.sub.2, 0-25% O.sub.2 and the balance N.sub.2 and/or inert gas.
摘要:
An improved method of storing and shipping a blood serum reference composition comprising in its non-biological component from about 40 to about 85 weight percent water, from about 15 to about 60 weight percent of at least one alkylene polyol having from 2-5 carbon atoms, the remainder being chiefly at least one natural biological material selected from a group consisting of blood serum, enzyme, metabolites, electrolytes, and hormones. The improvement comprises storing and/or shipping the composition at a temperature below the freezing point thereof.
摘要:
A stable blood control standard and method is provided for the quality control of the measurement of blood pH and gases in the clinical laboratory. The blood control standard comprises a sealed receptacle containing specially treated red cells and a gaseous head space at least equal to about the volume of the red cells. The special treatment comprises thorough washing and separating the red cells from the plasma components and mild treatment with aldehyde and retention in a buffered solution. The head space comprises from 0-15% CO.sub.2, 0-25% O.sub.2 and the balance N.sub.2 and/or inert gas.