ArnoldD. E.StansellM. J.MalvinH. H.Measurement of serum ionic calcium using a specific ion electrode. Amer. J. clin. Path.49 (1968) 627.
2.
BoldA. M.Measurement of dialysable calcium: a mechanised method for estimating the diffusible fraction of calcium in plasma. VII Int. Congr. Clin.-Chem., Geneva 1969, Vol. 1, 241, Karger, Basel, 1970.
3.
BoldA. M.HurstR. J.McSwineyR. R.Automated estimation of sodium potassium and calcium using the Eppendor flame photometer. J. clin. Path.18 (1965) 240.
4.
BreenM.FreemanS.The use of high centrifugal force in separating plasma calcium into its protein-bound and protein-free fractions. Clin. chim. Acta.6 (1961) 181.
5.
BriscoeA. M.RaganC.Coated charcoal assay of serum calcium fractions. J. Lab. Clin. Med.69 (1967) 351.
6.
ClarkE. P.CollipJ. B.A study of the Tisdall method for the determination of blood serum calcium with a suggested modification. J. biol. Chem.63 (1925) 461.
7.
DentC. E.Some problems of hyperparathyroidism. Brit. med. J.2 (1962) 1419.
8.
FareseG.SchmidtJ. L.MagerM.An automated method for the determination of serum calcium with glyoxal bis (2-hydroxyanil)Clin. Chem.13 (1967) 515.
9.
GerbrandyJ.van LeeuvenA. M.HellendoornH. B. A.de VriesL. A.The binding between electrolytes and serum proteins calculated from an in vivo filtration method. Clin. Sci.19 (1960) 181.
10.
GitelmanH. J.An improved automated procedure for the determination of calcium in biological specimens. Anal Biochem.18 (1967) 521.
GowenlockA. H.The influence of accuracy and precision on the normal range. Ann. clin. Biochem.6 (1969) 3.
13.
HallR. A.Variability between AutoAnalyzer filters. Ann. clin. Biochem.6 (1969) 79.
14.
HenryR. J.Clinical Chemistry, Principles and Techniques.Hoeber, New York, 1964.
15.
HodgkinsonA.EdwardsN. A.Total and ultra-filterable serum calcium in primary hyperparathyroidism. Brit. J. Urol.35 (1963) 445.
16.
JohnsonJ. R. K.RiechmanG. C.Normal serum calcium levels by atomic absorption spectroscopy. Clin. Chem.14 (1968) 1218.
17.
LewinM. R.WillsM. R.BaronD. N.Ultra-micro fluorimetric determination of calcium in plasma. J. clin. Path.22 (1969) 222.
18.
MacIntyreI.The flame-spectrophotometric determination of calcium in biological fluids and an isotopic analysis of the errors in the Kramer-Tisdall procedure. Biochem. J.67 (1957) 164.
19.
MagerM.FareseG.Direct photometric analysis of serum calcium with glyoxal bis (2-hydroxyanil). Clin. Chem.12 (1966) 234.
20.
MundayK. A.MahyB. W. J.Determination of ultra-alterable calcium and magnesium on small quantities of plasma. Clin. chim. Acta.10 (1964) 144.
21.
NordinB. E. C.SmithD. A.Diagnostic Procedures in Disorders of Calcium Metabolism.Churchill, London, 1965.
22.
OreskesI.HirschC.DouglasK. S.KupferS.Measurement of ionised calcium in human plasma with a calcium selective electrode. Clin. chim. Acta.21 (1968) 303.
23.
PeacockM.NordinB. E. C.The hypercalciuria of renal stone disease. In HodgkinsonA.NordinB. E. C. (Eds. Renal stoneresearch symposium.Churchill, London, 1969.
24.
PybusJ.Determination of calcium and magnesium in serum and urine by atomic absorption spectrophotometry. Clin. chim. Acta.23 (1968) 309.
25.
PyrahL. N.HodgkinsonA.AndersonC. K.Primary hyperparathyroidism. Brit. J. Surg.53 (1966) 245.
26.
Reinouts van HagaP.Micro determination of calcium in serum. Clin. chim. Acta.13 (1966) 678.
27.
RobertsonW. G.Measurement of ionised calcium in biological fluids. Clin. chim. Acta24 (1969) 149.
28.
RobertsonW. G.PeacockM.New techniques for the separation and measurement of the calcium fractions of normal human serum. Clin. chim. Acta20 (1968) 315.
29.
RodgersonD. O.MoranI. K.Comparison of atomic absorption spectrophotometry and fluorimetry for the measurement of serum calcium. Clin. Chem.14 (1968) 1206.
30.
RudolphG. O.HollerJ. J.FordW. J.Determination of serum and urine calcium. Clin. chim. Acta18 (1967) 187.
31.
SmeenkD.Stolsde Jan Van den BrandI. B. A. M.Influence of posture on some blood constituents. J. Bone Jt. Surg.51B (1969) 384.
32.
StokerD. J.WynnV.Effect of posture on the plasma cholesterol level. Brit. med. J.1 (1966) 336.
33.
ToribaraT. Y.TerepkaA. R.DeweyP. A.The ultra-filterable calcium of human serum 1. Ultra-filtration methods and normal values. J. clin. Invest.36 (1957) 738.
34.
TrudeauD. L.FreierE. F.Determination of calcium in urine and serum by atomic absorption spectrophotometry. Clin. Chem.13 (1967) 101.
35.
ZwartVoorspuij A. J.van der SlikW.The accuracy of sodium and potassium determination in the clinical laboratory. Clin. chim. Acta9 (1964) 99.