Glass electrode measurement of cerebrospinal fluid sodium and potassium |
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| Authors: | H D Portnoy E S Gurdjian |
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| Affiliation: | 1. Research Institute of Meat and Meat Products (IProCar), Universidad de Extremadura, Avda de las Ciencias s/n, 10003, Cáceres, Spain;2. LARUEX, Environmental Radioactivity Laboratory, Dept. Applied Physics, Faculty of Veterinary Sciences, Universidad de Extremadura, Avda Universidad s/n, 10003, Cáceres, Spain;1. Soil and Water Testing Laboratory, for Research, Dera Ghazi Khan, Punjab, Pakistan;2. Rapid Soil Fertility Survey & Soil Testing Research Institute, Thokar Niaz Baig, Lahore, Punjab, Pakistan;3. Provincial Reference Fertilizer Testing Laboratory (PRFT), Raiwind, Lahore, Punjab, Pakistan;4. Soil & Water Testing Laboratory, Muzaffargarh, Pakistan;5. Scientific Officer (Field), Dera Ghazi Khan, Pakistan;6. Civil Hospital, Sakhi Sarwar, Punjab, Pakistan;7. Regional Agricultural Research Institute, Bahawalpur, Pakistan;8. Sorghum Research Sub-station Dera Ghazi Khan, Pakistan;9. Cotton Research Institute, Multan, Punjab, Pakistan;10. Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;11. Department of Agricultural Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Punjab, Pakistan;12. Department of Crop Science and Biotechnology, Dankook University, South Korea;13. Soil and Water Testing Laboratory, Lodhran, Pakistan |
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| Abstract: | A routine ph meter and accessories have been modified for measuring sodium and potassium by the glass electrode method. CSF sodium and potassium concentrations measured by both the glass electrode and flame photometer have been compared. The mean concentration of sodium and potassium as measured by the electrode was 143/2.4 and by the photometer, 145/2.7. The average γ csfNa+ + K+ was 0.745. The average aNa+ was 108.03, average aK+, 2.01. The relationship between the concentrations as determined by the electrode and photometer is expressed by the equation Y = 0.888 X + 14.35 ± 1.36 for sodium and Y = 0.980 X − 0.24 ± 0.21 for potassium. |
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