Drugcontctitration ntcgmL x 00 molecular weight of drug gmol

Milliequivalents

An equivalent weight of a substance is that weight which will combine with or replace 1 g of hydrogen; a milliequivalent is 1/1,000 of an equivalent weight.

Milliequivalents per Liter

MUUequivalents per liter (mEq/L) =

weight of salt (gj x valence 6f idn x 1,000 molecular weight of salt mEq/L x molecular weight of salt

Weight of salt (g)

valence of ion x 1,0 U0

Approximate Milliequivalents: Weight Conversions for Selected Ions

rnEq/g

mg Salt/

Salt

Salt

m£q

Calcium carbonate itaGL^}

20.0

50.0

Caldurn chloride (CaCl 21\0)

13.6

73.5

Calcium glu ce prate (Ca[C.H|:Cy.}

41

2-45.2

Calcium gluconate (GaiC^.GJ. ■ H 0}

45

221.1

Calcium lactate (CaLC^H OJ ■ 5H:Q)

6.5

154.1

Magnesium gluconate {Mg[CfHMOy]. ■ Hp)

4.6

216.3

Magnesiunrt oxide (.MgO)

49,6

20.2

Magnesium sutfate (MgSO,)

16.6

6Û.2

Magnesium sulfate ^gSO, ■ 7H 0)

8.1

123.2

Potassium acetate (K[C HO])

10.2

98,1

Potassium chloride (KCI)

13.4

74.6

PoLaSsium citrate (K^CH.Q.1 ■ H 0}

9.2

10S.1

Potassium iodide {Kl)

6.Û

166.0

Sodium acetate (Na[C,H 0 ])

12.2

82.0

Sodium acetate (Na[CJ l,OJ - 3H 0)

73

136.1

Sodium bicarbonate (NaHCCy

11.9

34.0

Sodium chloride (Natl)

17.1

53.4

Sodium citrate {Na:[C, H Q.] ■ 2H 0]

10.2

08.0

Sodium iodide (Nal)

6.7

149.9

Sodium lactate (Na[Q 1.0J}

8,9

1111

H t

7.0

143.8

Valences and Atomic Weights of Selected Ions

Substance

Electrolyte

Valence

Molecular Weight

Calcium

Ca:t

2

40.1

Chloride

a-

1

35.5

Magnesium

2

24.3

Phosphate

HP04t(80%)

1.8

.nr

(pH = 7.4)

Hf PO, (20%)

Potassium

1

39.1

Sodium

Nah

1

23.0

Sulfate

SO",

2

.H0

The molecular weight of phosphorus only is 31; titat of sulfur only is 321

*This appendix contains information from Appendices 1 and 2 of Anderson PO, Knoben JE, Troutman WG, et al (eds). Handbook of Clinical Drug Data, 10th ed. New York: McGraw-Hill, 2002:1053-1058, with permission.

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