Nitrate analysis using the nitrate ion selective electrode in vegetables and its comparison with ion chromatography.

Nitrate level in vegetables by ion chromatography.

High nitrate concentrations in salads and vegetables have attracted increased attention. It is well know that nitrate can cause serious health problems to humans such as methemoglobinemia of infants 111. Under certain conditions, specially in the human body carcinogenic nitrosamines can be formed [2]. However, nitrate content of different types of vegetables fluctuates substantially with variet...

Determination of nitrogen oxides in ambient air using a coated-wire nitrate ion selective electrode.

In-ield measurement of soil nitrate using an ion-selective electrode

Standard laboratory methods for measurement of soil nitrate (NO3–N) use various procedures and instruments to analyze soil samples taken from the field and transported to the laboratory. Concerns with these procedures range from delays in measurement time, the high cost of soil sampling and analysis, high labour requirements, and the need to aggregate samples. With recent advances in using the ...

NOTES & UNIQUE PHENOMENA Using a Nitrate Specific Ion Electrode to Determine Stalk Nitrate-Nitrogen Concentration

The end-of-season stalk NO, test has been used to determine N sufficiency in corn (Zea mays L.). Nitrate concentration is commonly determined with flow-injection analysis (FIA), which is accurate but uses hazardous chemicals and is time-consuming. Use of a simpler method of NO, determination, such as the NO, specific ion electrode (SIE), may save time and costs, and reduce hazards. The objectiv...

Effect of phenols on the potentiometric response of a nitrate-ion-selective electrode.

The effect of phenols containing different electron-withdrawing substituents on the potentiometric responses of several liquid PVC membranes containing the complex trioctylmethylammonium-nitrate, TOMA(+)NO(3)(-), is analyzed. The results make it possible to separate these phenols into two groups; those phenols containing electron-releasing groups, which produce almost Nernstian slopes, and thos...