FED-STD-791D
5.5 Hydrochloric acid, dilute, made by diluting one volume of reagent grade acid,
sp.gr. 1.18 with an equal volume of water [3,0,0].
5.6 Ethyl ether, reagent grade [2,4.1]
5.7 Sodium sulfate, anhydrous, reagent grade[u,u.u]
5.8 Diethylene glycol adipate polyester [u,u.u]
5.9 Gas Chrom P, 60 to 80 mesh, acid-based washed, or equivalent
5.10 Chloroform ,reagent grade[2,2,0 ].
5.11 Phosphoric acid, reagent grade, 85% [2,0,0 ].
5.12 Helium, oil free.
5.13 Butyric acid, reagent grade, [2,2,0 ].
5.14 Isovaleric acid, reagent grade [u,u.u]
5.15 Valeric acid, reagent grade [u,u.u]
5.16 Caproic acid, reagent grade [2,1,0 ].
5.17 Eptylic acid reagent grade [u,u.u]
5.18 Caprylic acid, reagent grade [u,u.u]
5.19 Pelargonic acid, reagent grade [u,u.u]
5.20 Capric acid, reagent grade [u,u.u]
5.21 Standard acid mixture prepared as follows:
5.22 By means of an analytical balance successively weigh into a 125-mL glass-
Stopperd bottled aa the acids listed in 5.13 through 5.20 in the amounts indicated in the
table below. These listed weights give concentrations of the mixed acids in terms of the
indicated individual mole percent.
Acid
Mole percent
Number of carbon
Weight in grams
Atom in acid
Butyric
4
4.41
10
Isovaleric
5
5.11
10
Valeric
5
5.11
10
Caproic
6
5.81
10
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