title: Practical aspects of a measurement technique for calcium ion activity in plasma.
mesh_terms: D000328:Adult; D000388:Air; D000818:Animals; D001769:Blood; D001793:Blood Preservation; D001800:Blood Specimen Collection; D001835:Body Weight; D002118:Calcium / Q000097:blood*; D002648:Child; D004355:Drug Stability; D004566:Electrodes; D005069:Evaluation Studies as Topic; D005385:Fingers; D005615:Freezing; D006365:Heel; D006493:Heparin; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007223:Infant; D007231:Infant, Newborn; D007477:Ions / Q000097:blood; D008274:Magnesium / Q000097:blood; D008297:Male; D008722:Methods; D009915:Orbit; D009994:Osmolar Concentration; D010949:Plasma / Q000032:analysis; D051381:Rats; D013696:Temperature; D013997:Time Factors; D014680:Veins
chemical_list: D007477:Ions; D006493:Heparin; D008274:Magnesium; D002118:Calcium