ELECTROLYTES QUIZ 1

• Major determinant of plasma osmolality

  Sodium
• formula for osmolality

  $2 Na +$$glucose/20+$$BUN/3$$1.86Na +$$glucose/18+$$BUN/2.8+$$9$
• reference range for osmolal gap

  5-10 mOsm/kg
• colorimetric method for sodium

  albanese-lein method
• measured in ethanol poisoning

  osmolal gap
• normal value serum Na

  135-145 mmol/L
• Normal value of K

  3.5-5.5 mmol/L
• colorimetric method for chloride

  schales and schales
• value of chloride for cystic fibrosis

  ≥60 mmol/L
• in ISE method, the membrane is impregnated with this antibiotic

  Valinomycin
• membrane used in ISE method for chloride

  silver silver chloride
• specimen extraction for cystic fibrosis

  pilocarpine iontophoresis
• titrating reagent for zall color reaction

  mercuric thiocyanite
• color developer for zall color reaction


  ferric nitrite
• interference in Cotlove chloridometer (colorimetric for chloride)

  bromide, cyanide, cysteine
• colorimetric method for potassium

  lockhead and purcell