HNO3


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Related to HNO3: HC2H3O2

nitric acid (HNO3)

[nī′trik]
Etymology: Gk, nitron, soda; L, acidus, sour
a colorless, highly corrosive liquid that may give off suffocating brown fumes of nitrogen dioxide on exposure to air. Traces of nitric acid may be found in rainwater during a thunderstorm. Commercially prepared nitric acid is a powerful oxidizing agent used in photoengraving and metallurgy; in the manufacture of explosives, fertilizers, dyes, and drugs; and occasionally as a cauterizing agent for the removal of warts. Organic nitrates or polyol esters of nitric acid such as nitroglycerin and amyl nitrite are effective vasodilators often used in relieving angina, but exactly how they function in dilating arterial and venous smooth muscle is not yet understood. Historically known as aqua fortis.

HNO3

Formula for nitric acid.
CAS # 7697-37-2
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The content of the flask were brought to volume with water and added 2ml of 2N HNO3 and brought to flam atomic absorption spectrophotometer.
The precision of the analytical procedures was expressed as relative standard deviation (RSD) which ranged from 5% to 10% and was calculated from the standard deviation divided by the mean The working solutions were daily prepared by appropriate dilutions of the standard stock solution, using a mixture of 65% (v/v) HNO3, 30% (v/v) H2O2 and H2O (v/v/v = 1:1:3).
In the pH effect experiment, the desired solution pH was first adjusted by HNO3 or NaOH.
HNO3 solution was used as the desorbing solution and the adsorption capacities remain stable after three adsorptions and desorption respectively [57].
The pH of the samples was adjusted to about 2 by adding 5 ml concentrated HNO3 and the samples were transferred 500 ml polypropylene bottle and stored in a refrigerator until the measurement process.
Tenders invited for Cross- woven teflon tube, 5-strandnullgarland type tubular heater forsteam heating of hf+ hno3 picklingnullbath as per the annexure attached
The elution of copper ions retained on the adsorbent was carried out with 3 mL of 1 mol/L HNO3 solution.
Sample (2 g) was weighed in digestive tube to which 4 ml HNO3 was added and covered with small funnel in the fume hood.
Picric acid Mn(NO3)24H2O Co(NO3)26H2O Cu(NO3)23H2O Zn(NO3)26H2O Pb(NO3)2 HNO3 NaNO3 CH3COOH CH3COONa dichloromethane and chloroform were purchased from Merck.
5 g) of shoots and roots were digested in concentrated HNO3 (5 mL) at 100C temperature and then raised the temperature at150C in digestion tubes and then made volume of the extracted up to 50 mL in the volumetric flask.
Soil samples were digested with concentrated HCl +concentrated HNO3 + HF + HClO4 (10:5:5:3, v/v) and plant tissues (fruits and leaves) digested with concentrated HNO3-H2O2 acid mixture (2:3 v/v) in three step (first step; 145oC, 75%RF, 5 min; second step; 180oC, 90%RF, 10 min and third step; 100oC, 40%RF, 10 min) in microwave (Bergof Speedwave Microwave Digestion Equipment MWS-2) (Mertens 2005a).