Electrochemical determination of vanillylmandelic acid and its analogous compounds.
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چکیده
منابع مشابه
Separation and determination of homovanillic acid and vanillylmandelic acid by capillary electrophoresis with electrochemical detection
A method of separation and determination of homovanillic acid (HVA) and vanillylmandelic acid (VMA) was developed based on capillary zone electrophoresis/amperometric detection with high sensitivity, good resolution and selectivity. In order to achieve complete separation and good response, several factors including pH, buffer concentration, separation voltage, detection potential and the lengt...
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We describe an improved method for the assay of urinary vanillylmandelic acid by "high-performance" liquid chromatography, with electrochemical detection. A 1-mL aliquot of urine is acidified and extracted with ethyl acetate, then the ethyl acetate extract is extracted with phosphate buffer, pH 8.5. An acidified aliquot of the phosphate extract is injected into a reversed-phase column and vanil...
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سنتز سبز نانوذرات فلزی (nps) درسالهای اخیر توجه بسیارزیادی را به خود جلب کرده است. زیرا این پروتوکل کم هزینه وسازگار با محیط زیست از روش های استاندارد سنتز. در این پایان نامه ما گزارش میکنیم یک روش ساده و سازگار با محیط زیست برای سنتز نانوذرات نقره با استفاده از محلول آبی عصاره گیاه allium iranicum به عنوان یک عامل کاهش دهنده ی طبیعی. نانو ذرات نقره مشخص شد با استفاده از تکنیک های uv-visible، x...
Determination of urinary 3-methoxy-4-hydroxymandelic acid (vanillylmandelic acid) by paper electrophoresis.
called vanillylmandelic acid (VMA), in urine has recently come into use as a confirmatory test for pheochromocytoma (1-6). Armstrong and his associates (1, 2, 7) discovered that this phenolic acid occurred in small amounts in normal human urine and in elevated concentrations in pheochromocytoma. As a result of their observations (1, 2) and especially of those by others in related investigations...
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A simple, accurate and sensitive voltammetric method for determination of Anagrelide (ANG) using β cyclodextrin modified carbon paste electrode (CDMCPE) is developed. CDMCPE exhibited significantly increased sensitivity and selectivity for ANG compared to Carbon paste electrode. Peak currents showed a linear response in the concentration range 1.8 × 10-9 to 1.6 × 10-6 M at CDMCPE. Limit of dete...
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ژورنال
عنوان ژورنال: Analytical Sciences
سال: 1985
ISSN: 0910-6340,1348-2246
DOI: 10.2116/analsci.1.85