Magnesium

Question 1

Reagents for magnesium

Answer 1

Ethanolamine pH 11.0 750 mmol/L
GEDTA (Glycoletherdiamine-tetraacetic acid) 60 umol/L
Xylidyl blue 110 umol/L

Question 2

Method for magnesium

Answer 2

Photometric test using xylidyl blue

Question 3

Specimen for magnesium

Answer 3

serum, plasma, cerebrospinal fluid or urine

Question 4

Wavelength for magnesium

Answer 4

520 nm, Hg 546 nm, 500 - 550 nm (Increase of absorbance)
628 nm, Hg 623 nm, 570 - 650 nm (Decrease of absorbance)

Question 5

Measurement magnesium

Answer 5

Against reagent blank

Question 6

Conversion factor for magnesium

Answer 6

0.4114

Question 7

Refence range for magnesium

Answer 7

Women 1.9-2.5 mg/dL (0.77-1.03 mmol/L)
Men 1.8-2.6 mg/dL ( 0.73-1.06 mmol/L)

Question 8

Reference range in magnesium for urine and csf

Answer 8

Urine: 73-122 mg/24 hr (3-5 mmol/24hr)
CSF: 2.1-3.3 mg/dL (0.85-1.35 mmol/L)

Question 9

Principle of magnesium

Answer 9

Magnesium ions form a purple colored complex with xylidyl blue in alkaline solution. In presence of GEDTA, which complexes calcium ions, the reaction is specific. The intensity of the purple color is proportional to the magnesium concentration.

Question 10

Decreased magnesium concentrations

Answer 10

Neuromascular irritability (tremor, seizures)
Cardiac symtonps ( tachycardia, arrythmia)

Question 11

Decreased magnesium concentrations are often related to

Answer 11

Decreased calcium and potassium levels taking into hypomagnesemia may be primary cause of hypocalcemis

Question 12

Elevated magnesium values

Answer 12

Dehydration
Renal disorder
After intake of excessive amount od antacids

Question 13

Stored at

Answer 13

2-8 degree celcius

Question 14

Inferences

Answer 14

Hemoglobin

Question 15

Hormones associated with Magnesium

Answer 15

Parathyroid Hormones
Aldosterone and Thyroxine

Question 16

Methods for Magnesium

Answer 16

Colorimetric method
Dye Lake Method- Titan Yellow Due
Atomic Absorption Spectrophotometry
Ion Selective Electrode