Semimicro Flame Photometry of Serum Sodium and Potassium

1956 ◽  
Vol 2 (2) ◽  
pp. 112-116 ◽  
Author(s):  
R L Dryer
Keyword(s):  
Serum Sodium ◽  
Lithium Concentration ◽  
Flame Photometry ◽  
Dilution Factor ◽  
Serum Dilution ◽  
Careful Control ◽  
Photometric Error ◽  
The Mean ◽  
Sodium And Potassium

Abstract A method for the determination of serum sodium and potassium involving only a single serum dilution is described. Samples of 0.1 ml. of serum suffice for both determinations, but larger samples may also be used. By careful control of the lithium concentration and the dilution factor the mean relative photometric error may be held to no more than 1 per cent under normal circumstances of operation.

DETERMINATION OF SERUM-SODIUM LEVELS BY FLAME PHOTOMETRY

The Lancet ◽  
1963 ◽  
Vol 282 (7308) ◽  
pp. 639
Author(s):  
J.T. Wearne
Keyword(s):  
Serum Sodium ◽  
Flame Photometry

DETERMINATION OF SERUM-SODIUM LEVELS BY FLAME PHOTOMETRY

The Lancet ◽  
1963 ◽  
Vol 282 (7300) ◽  
pp. 196-197
Author(s):  
A.F. Mohun ◽  
I.J.Y. Cook
Keyword(s):  
Serum Sodium ◽  
Flame Photometry

EVALUATION OF FLAME PHOTOMETRIC DETERMINATION OF MAGNESIUM IN PLANT MATERIAL

1964 ◽  
Vol 44 (6) ◽  
pp. 520-524
Author(s):  
A. A. MacLean
Keyword(s):  
Standard Error ◽  
Plant Material ◽  
Photometric Determination ◽  
Flame Photometry ◽  
Mean Values ◽  
Edta Titration ◽  
The Mean ◽  
Flame Method ◽  
Oxyhydrogen Flame

Flame methods for the determination of magnesium in plant material were compared with EDTA titration and a thiazole yellow procedure. Mean values for quadruplicate determinations on 24 samples were 0.544, 0.543, 0.532, and 0.514% for EDTA, flame photometry with an oxyhydrogen flame, thiazole yellow, and flame photometry with an oxyacetylene flame respectively.The degree of precision, as indicated by the standard error of the mean, was highest for the oxyhydrogen flame method and lowest when the oxyacetylene flame was used.Silica repressed magnesium emission with either flame source but degree of interference was greater with the oxyhydrogen flame.

scholarly journals Empiric Determination of the Daily Glucocorticoid Replacement Dose in Adrenal Insufficiency

2020 ◽  
Vol 4 (11) ◽  
Author(s):  
Celina M Caetano ◽  
Aleksandra Sliwinska ◽  
Parvathy Madhavan ◽  
James Grady ◽  
Carl D Malchoff
Keyword(s):  
Blood Pressure ◽  
Body Mass Index ◽  
Adrenal Insufficiency ◽  
Serum Sodium ◽  
Sodium Concentration ◽  
Cortisol Secretion ◽  
Endocrine Society ◽  
The Mean ◽  
Multiple Morbidities

Abstract Background For the treatment of adrenal insufficiency (AI) in adults, the Endocrine Society’s recommended daily glucocorticoid replacement dose (DGRD) is 15 to 25 mg hydrocortisone (HC), which is approximately 1.7 times the reported mean daily cortisol production rate. Prolonged glucocorticoid overtreatment causes multiple morbidities. Hypothesis We tested the hypotheses that the DGRD, empirically determined by individual patient titration, is lower than that of the Endocrine Society guidelines and tolerated without evidence of glucocorticoid under-replacement. Methods We empirically determined the DGRD in 25 otherwise healthy adults with AI by titrating the DGRD to the lowest dose tolerated as judged by body mass index, blood pressure, serum sodium concentration and AI symptoms. Patients received either HC or prednisone (PRED). The HC equivalent of PRED was assumed to be 4:1. Results The mean empirically determined DGRD, expressed as HC equivalent, was significantly less than the midpoint of the Endocrine Society’s recommended DGRD (7.6 ± 3.5 mg/m2 vs 11.8 mg/m2; P < 0.001). The DGRD in the adrenalectomy group was not significantly different than the DGRD of those with other AI causes (7.9 ± 4.0 mg/m2 vs 7.3 ± 3.1 mg/m2; P = ns), demonstrating that the empirically determined DGRD was not biased by residual cortisol secretion. There was no evidence of glucocorticoid under-replacement as determined by measured biometrics and AI symptoms. Conclusions We conclude that an empirically determined DGRD is significantly lower than that of the Endocrine Society guidelines and tolerated without evidence of glucocorticoid under-replacement.

An Inexpensive System of Automated Flame Photometry of Serum Sodium and Potassium

1974 ◽  
Vol 11 (1-6) ◽  
pp. 238-241
Author(s):  
M. I. Thomas ◽  
R. A. Saunders
Keyword(s):  
Serum Sodium ◽  
Flame Photometry ◽  
Flame Photometer ◽  
Sodium And Potassium

An inexpensive automated flame photometry system has been produced by utilising an I.L. 143 flame photometer fitted with an analogue output connected to a sampler (AutoAnalyzer or other). The pump of the I.L. 144 dilutor is used to aspirate the sample and a variety of single or two pen recorders can be used to record the results at the rate of 60 specimens an hour.

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