In this work I inspected the quality of blood collection tubes (BCT) from three producers, Greiner BIO-ONE, LT Burnik and BD, with two methods, ion chromatography and molecular absorbtion spectrometry. With ion exclusion chromatography and molecular absorbtion spectrometry technique I was able to determine concentration of trisodium citrate. The results revealed that concentration of trisodim citrate determined with both techniques differ from nominal concentration in BCT of all three producers. It also became apparent from chromatograms that contaminants are present in samples. Some of contaminats that I suspected and was able to confirm were K$^+$, Mg$^{2+}$, Ca$^{2+}$, heparin, ... With ion exchange chromatography I was able to determine Li$^+$, Na$^+$, K$^+$, Mg$^{2+}$ and Ca$^{2+}$ in almost all three producers' BCTs. I also inspected the volume of added anticoagulant in new BCTs. I concluded that volume is within the ±10 % tolerance limits.
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