Mikrochimica Acta [Wien] 1979 I, 267--278. 9 by Springer-Verlag 1979. Department of Pharmaceutical Chemistry, University of Pavia, Pavia, Italy. Potentiometric Microdetermination of Lead(II) With an Ion-Selective Lead …

Potentiometric Microdetermination of Aluminium in Organic Compounds After Combustion in a Modified Oxygen Flask Antonio Campiglio Abstract. For the microdetermination of aluminium in organic compounds by oxygen flask combustion, a simultaneous fusion- ... Aluminium potassium sulfate, KAl(SO4)2-12H~O (Fluka, puriss, …

Potassium hydrogen phthalate, perchloric acid and glacial acetic acid of A. R. grade were used. General procedure Standardization of 0.1 N perchloric acid About 0.350 mg of potassium hydrogen phthalate (previously powdered lightly, dried at 120oC for 2 hours) was weighed accurately into clean and dry titration jar.

The potentiometric break is sufficiently sharp to permit the use of 0.003 N AgNO 3 to titrate 0.4–5.0 mg ... they are suitable for use with standard laboratory pH meters. EXPERIMENTAL Reagents Potassium chloride, reagent grade. ... ISSUE 2 MICRODETERMINATION OF CHLORIDE 259 A blank titration is made on the solvent. …

Potentiometric method for the macro- and micro-determination of thallium by oxidation with potassium permanganate in alkaline solutions . I. M. Issa and R. M. Issa Abstract. The first page of this article is displayed as the abstract. ...

Mikrochimica Acta [Wien] 1981 II, 251--260 0 by Springer-Verlag 19~1 Lawrence Livermore National Laboratory, University of California, Livermore, Cal., U. S. A. Potentiometric Microdetermination of Ammonium Salts of Some Nitroheterocycles* By Walter Selig With 4 Figures (Received January 20, 1981) Work is in progress at this …

Determination of Potassium Magnesium does not interfere, because it forms an easily alcoholsoluble picrate. The titration of the potassium picrate with methylene blue is very sensitive and is preferable to that of potassium acid tartrate with sodium hydroxide (4). SUMMARY A method has been described for the volumetric microdetermination of ...

Microdetermination of Nitrophenols The typical titration curves (Figs. la, b) for potentiometric determination of NP'S are characterized by one small inflection and other final sharp inflection lying in the immediate vicinity of the expected endpoints. The results of determining various concentrations of nitrophenols are given in Table 1.

Potentiometric Microdetermination of Ammonium Salts of Some Nitroheterocycles* By Walter Selig With 4 Figures (Received January 20, 1981) Work is in progress at this Laboratory on the detonation calo- ... nitrate was standardized against aliquots of a potassium bromide solution prepared from A. C. S. reagent. The CPC was standardized …

Potentiometric method for the macro- and micro-determination of thallium by oxidation with potassium permanganate in alkaline solutions I. M. Issa and R. M. Issa, Analyst, 1954, 79, 771 DOI: 10.1039/AN9547900771 . To request permission to reproduce ...

potassium ISE. In this work we report the use of the fluoroborate, perchlorate, and nitrate liquid-membrane ISE's and the solid-state cyanide ISE for the potentiometric microdetermination of various organic cations with TPB. Experimental Reagents The titrant was approximately 0.01N aqueous sodium tetraphenyl-

titrimetric microdetermination of chloride, sodium, and potassium in a single tissue or blood sample Author links open overlay panel William G. Clark, Nathan I. Levitan, Donald F. Gleason, Goodwin Greenberg

@article{osti_5134892, title = {Potentiometric microdetermination of 1,3,5-trinitro-1,2,5-triazacyclohexane and 1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane in several solvents. [Tetrabutylammonium hydroxide as titrating reagent]}, author = {Selig, W}, abstractNote = {Pyridine, tetramethyl guanidine, and hexamethylphosphoramide were evaluated as …

Another interesting and very sensitive method is investigated for the microdetermination of iodate and periodate involving reduction with sulfurous acid, prior to potentiometric titration of the resulting iodide as mentioned above. The results indicate that potassium iodate and periodate are excellent primary standards for mercury(II).

Three equivalents of potassium iodide as titrant are consumed per mole of nitrate or nitramine group. The results obtained, with sample sizes ranging from 1.0 to 50 μmole, are precise to ± 0.2% and the average recovery is 99%. ... Atomic absorption spectrometric and potentiometric microdetermination of the nitro and nitroso groups in …

The potentiometric titration of very low quantities of sulphate (down to 0.25μg) in very small water samples (0.25 ml) is described. Sulphate is precipitated by lead perchlorate in a 50% water-dioxan mixture. The excess of lead is determined with a solid-state lead-selective electrode by the known addition method using Gran's plot paper for location of the …

With potassium ferricyanide copper(II) forms KCu 10,[Fe(CN) 6] 7 quantitatively in 0·5M potassium nitrate medium. Cadmium forms Cd 3 [Fe(CN) 6] 2 if the ferricyanide is added to the cadmium solution in absence of extra potassium, and KCd 10 [Fe(CN) 6] 7 if potassium is added first, or if the cadmium solution is added to the ferricyanide. Silver …

Potentiometric microdetermination of potassium, rubidium, and cesium with tetraphenylborate without separation of precipitate ☆

Potentiometric microdetermination of potassium, rubidium, and cesium with tetraphenylborate without separation of precipitate - ScienceDirect Article preview …

Iodates and periodates were used for potentiometric microdetermination of o-, p-, ... Potassium iodide (0.0993-0.1016 M) and mercuric nitrate (0.05 M) solutions were standardized po- tentiometrically (17). Sulfuric acid (0.2 M) was used to adjust the pH. Procedure. To 1-10 ml ofAP in a titration cell add gradually 1-5 ml of iodate or periodate ...

Li et al. (2021) demonstrated a stainless-steel hollow microneedle-based potentiometric sensing system for continuous monitoring of multiple electrolytes in skin interstitial fluids. …

The invention relates to a potentiometric method for determining the amount of potassium ions in pharmaceutical preparations.The method, according to the invention, comprises addition of a predetermined amount of sodium tetraphenylborate in excess to the analyzed sample containing potassium ions and subsequent potentiometric titration of the …

Mercury(I) can be titrated potentiometrically with permanganate in the presence of fluoride and sulphuric acid The optimum conditions are 2.5– 10 ml of 9 N acid and 10–100 ml of 2% sodium fluoride at a tempeiature of 25–40° Larger amounts can be determined than in the visual method, although copper (II) is a suitable indicator screen in the titration of fairly …

The results obtained are accurate within ±0.08%; the recoveries of Co are in the range of 99.52 to 99.97%; the standard deviation is 0.06%. The potentiometric titration of Co(II) with sodium diethyldithiocarbamate and other reagents, as well as the conditions for the oxygen flask combustion of organic cobalt compounds, is discussed.

D. Potentiometric detection It will be helpful to review some features of potentiometric detection before proceeding with the experimental discussion. 1. General. Potentiometry exploits electrochemical properties of chemical systems. In potentiometry, the aim is to measure the potential of a system without drawing any current from it,

The implementation of a new calibration approach, termed the Signal Increment Standard Addition Method (SI-SAM), to the potentiometric determination of potassium in the synthetic samples and certified reference materials, is investigated. SI-SAM is a modification of SAM that is based on the change in the way in which the …

The potentiometric microdetermination of cobalt in organic compounds after combustion in a modified oxygen flask. 1992, Microchemical Journal ... A measured excess of potassium bromide is added to reduce unreacted peroxodisulfate, and the excess bromide is titrated potentiometrically with silver(1). The amount of silver = bromide ...

Simple and direct potentiometric determination of potassium ions in biodiesel microemulsions at a glassy carbon electrode modified with nickel (ii) hexacyanoferrate …

Rapid potentiometric methods were given for determination of some sulfide and chromate pigments in pure as well as adulterated samples. The methods are based on oxidation of S 2− or Cr 3+ with known excess of KBrOs 3 to the corresponding (S ↓) or Cr 6−.Oxidation of trivalent chromium proceeds only toward completion in presence of a …

Macro- and microdetermination of mercury(I) using potassium permanganate as an oxidant in acid medium in presence of fluoride ions. ... -'8 N HNOs, % NaF and ^-'0.25 M CuSO-i were prepared by dissolving the C.P. materials in twice-distilled water. Potentiometric Equipment This is the same as previously described (5). …