A comparison of pooled, fresh-frozen, and lyophilized sera as a matrix for enzyme proficiency testing: The experience of the Ontario Laboratory Proficiency Testing Program

Clinical Biochemistry

Volumn 29, Issue 2, 1996, Pages 183-185

  Henderson, A Ralph ^a,b   Webb, Sharon ^a   Richardson, H ^a   Wood, Donald E ^a  

^a Lab Proficiency Testing Program   (Canada)

^b LONDON HEALTH SCIENCES CENTRE   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

ALKALINE PHOSPHATASE; CREATINE KINASE;

ACCURACY; ANALYTIC METHOD; ARTICLE; CONTROLLED STUDY; ENZYME ACTIVITY; ENZYME ASSAY; FREEZE DRYING; HUMAN; PH; PRIORITY JOURNAL; QUALITY CONTROL; SERUM;

EID: 0029928667     PISSN: 00099120     EISSN: None     Source Type: Journal    
DOI: 10.1016/0009-9120(95)02046-2     Document Type: Article

References (11)

1. McQueen MJ, Henderson AR, Patten RL, Krishnan S, Wood DE, Webb S. Results of a province-wide quality assurance program assessing the accuracy of cholesterol, triglycerides, and high-density lipoprotein cholesterol measurements and calculated low-density lipoprotein cholesterol in Ontario, using fresh human serum. Arch Pathol Lab Med 1991; 115: 1217-22.
2. Naito HK, Kwak Y, Hartfiel JL, et al. Matrix effects on proficiency testing materials: impact on accuracy of cholesterol measurement in laboratories in the Nation's largest hospital system. Arch Pathol Lab Med 1993; 117: 345-51.
3. McQueen MJ, Patten RL, Henderson AR, Krishnan S, Wood DE, Webb S. Proficiency testing for creatine kinase isoenzyme CK-2 (CK-MB) in Ontario. Clin Chem 1990; 36: 2102-5.
4. Rej R. Accurate enzyme activity measurements: two decades of development in the commutability of enzyme quality control materials. Arch Pathol Lab Med 1993; 117: 352-64.
5. Flosdorf EW. Freeze-Drying: Drying by Sublimation. New York: Reinhold, 1949.
6. Everse J, Stolzenbach FE. Lyophilization. Meth Enzymol 1971; 22: 33-9.
7. Scopes RK. Protein Purification: Principles and Practice. New York: Springer-Verlag, 1982.
8. Massion CG, Frankenfeld JK. Alkaline phosphatase: lability in fresh and frozen human serum and in lyophilized control material. Clin Chem 1972; 18: 366-73.
9. Henderson AR, Stark JA, McQueen MJ, et al. Is the determination of creatine kinase-2 after electrophoretic separation accurate? Clin Chem 1994; 40: 177-83.
10. Nealon DA, Pettit SM, Henderson AR. Effect of serum pH on storage stability and reaction lag phase of human creatine kinase isoenzymes. Clin Chem 1980; 26: 1165-9.
11. Nealon DA, Pettit SM, Henderson AR. Activation of human creatine kinase isoenzymes by pH and various sulfhydryl and chelating agents. Clin Chem 1981; 27: 402-4.