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preface to fifteenth edition

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2.10 SECTION 2<br />

TABLE 2.2<br />

Physical and Chemical Symbols and Definitions (Continued)<br />

C. Chroma<strong>to</strong>graphy (continued)<br />

Name Symbol Definition<br />

Specific retention volume V g Vg<br />

273 R/(p Mw L)<br />

Thickness (effective) of stationary<br />

d f<br />

phase<br />

Total bed volume<br />

V <strong>to</strong>t<br />

Transit time of nonretained<br />

t M , t 0<br />

solute<br />

Vapor pressure<br />

p<br />

Volume liquid phase in column V L<br />

Volume mobile phase in column V M<br />

Weight of liquid phase<br />

w L<br />

Zone width at baseline W b W b 4<br />

Zone width at peak height<br />

1⁄2 W 1/2<br />

D. Colloid and surface chemistry<br />

Name Symbol SI unit Definition<br />

Adsorbed amount of B n s B mol<br />

Area per molecule a, m 2 a B A/NN<br />

<br />

Area per molecule in a a m m 2 a m,B m,B<br />

filled monolayer<br />

Average molar masses:<br />

Mass-average M m kg · mol 1 2<br />

M m n i M i /n i M i<br />

Number-average M n kg · mol 1 M n n i M i /n i<br />

Z-average M Z kg · mol 1 3 2<br />

M Z n i M i /n i Mi<br />

Contact angle rad<br />

Film tension f N·m 1 f 2 f<br />

Film thickness t, h, m<br />

Reciprocal thickness of the m 1 [2F 2 I c /RT] 1/2<br />

double layer<br />

Retarded van der Waals , B J<br />

constant<br />

Sedimentation coefficient e s s s v/a<br />

Specific surface area a, s, a s m 2 /kg a A/m<br />

<br />

Surface coverage N B/N B<br />

Surface excess of B nB mol<br />

Surface pressure s , N·m 1 s 0 <br />

Surface tension, interfacial , J·m 2 (G/A s ) T,p<br />

tension<br />

Thickness of (surface or interfacial)<br />

, , t m<br />

layer<br />

Total surface excess concentration<br />

mol · m 2 i<br />

van der Waals constant J<br />

van der Waals-Hamaker<br />

constant<br />

A H J<br />

e<br />

v is the velocity of sedimentation and a is the acceleration of free fall or centrifugation.

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