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.

Deproteinizing methods evaluated for determination of uric acid in serum by reversed-phase liquid chromatography with ultraviolet detection.

1987 ◽  
Vol 33 (8) ◽  
pp. 1427-1430 ◽  
Author(s):  
R Sakuma ◽  
T Nishina ◽  
M Kitamura
Keyword(s):  
Uric Acid ◽  
Liquid Chromatography ◽  
Perchloric Acid ◽  
High Performance ◽  
Reversed Phase ◽  
Precipitation Method ◽  
Zinc Hydroxide ◽  
Good Precision ◽  
Ultraviolet Detection

Abstract We evaluated six deproteinizing methods for determination of uric acid in serum by "high-performance" liquid chromatography with ultraviolet detection: those involving zinc hydroxide, sodium tungstate, trichloroacetic acid, perchloric acid, acetonitrile, and centrifugal ultrafiltration (with Amicon MPS-1 devices). We used a Toyosoda ODS-120A reversed-phase column. The mobile phase was sodium phosphate buffer (40 mmol/L, pH 2.2) containing 20 mL of methanol per liter. Absorbance of the eluate was monitored at 284 nm. The precipitation method with perchloric acid gave high recoveries of uric acid and good precision, and results agreed with those by the uricase-catalase method of Kageyama (Clin Chim Acta 1971;31:421-6).

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