Plastics. Phenolic resins. Determination of hexamethylenetetramine content. Kjeldahl method and perchloric acid method

1997 ◽  
Keyword(s):  
Perchloric Acid ◽  
Phenolic Resins ◽  
Acid Method ◽  
Kjeldahl Method

Determination of Sulfur in Coal by Perchloric Acid Method

1932 ◽  
Vol 4 (2) ◽  
pp. 227-229 ◽  
Author(s):  
G. Frederick Smith ◽  
A. Garrell Deem
Keyword(s):  
Perchloric Acid ◽  
Acid Method ◽  
Sulfur In Coal

Spectrophotometric Determination of Aluminum, Iron, Manganese, Phosphorus, and Titanium in Liming Materials

1964 ◽  
Vol 47 (4) ◽  
pp. 620-626
Author(s):  
P Chichilo
Keyword(s):  
Spectrophotometric Determination ◽  
Perchloric Acid ◽  
Acid Method ◽  
Aluminum Iron ◽  
Iron Manganese

Abstract Methods have been developed for the determination of aluminum with ammonium aurintricarboxylate (Aluminon); iron with 2,4,6-tripyridyl-s-triazine (TPTZ); manganese by oxidation to permanganate with KI04; phosphorus by a heteropoly blue method; and titanium with disodium-1,2-dihydroxybenzene-3,5-disulfonate (Tiron), Detertested are carried out on the filtrate obtained in the AOAC perchloric acid method for silicon. Adequacy of the directions was established by “ruggedness tests,” and the procedures were used to analyze carbonate and silicate liming materials. It is recommended that the methods be studied collaboratively.

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