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a.1.(Chem.) Pertaining to, or designating, the highest oxygen acid (HClO4), of chlorine; - called also hyperchloric.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Shoot and root ground samples (0.5 g) were digested in 3:1 mixture of nitric acid and perchloric acid at 150degC (Miller, 1998).
[4] kinetics and mechanism of Mn(ii) catalyzed oxidation of DArabinose and D-xylose by chromium(vi) ions in perchloric acid medium was also reported.
The erythrocytes were washed with cold saline by centrifuging at 2000g for 5 min, precipitated by adding 6% of cold perchloric acid (3mL), and centrifuged again at 2000g for 10 min.
and Basu S.N., 1980, "Kinetics and mechanism of oxidation of Derythrose and DL-glyceraldehyde by Cr (VI) and Vanadium (V) in perchloric acid medium" Carbohydrate Research, 86, 7-16.
Rapid perchloric acid digest methods for analysis of major elements in plant tissue.
Acetic acid, perchloric acid, and potassium permanganate were purchased from Merck, and methanol was from LabScan.
Synthesis and purification of LTX-diol and iso-LTX-dioL Approximately 20 mg of the waxy white solid described above was dissolved in THF:[H.sub.2]O:5% perchloric acid (5:1:1) and stirred at 22[degrees]C for 1 hr.
Each freeze-dried sample (200 g) was homogenized in 5 mL 100 g [kg.sup.-1] perchloric acid (PCA).
[1] These authors found that sulfuric acid and perchloric acid in solution in anhydrous acetic acid were able to protonate a variety of weak bases such as ketones and other carbonyl compounds that do not form salts in aqueous solutions of the same acids.