Determination of sodium and potassium in salt by atomic absorption spectrophotometry or potassium by gravimetry with tetraphenyl boron

Banerjee, Gurupada

doi:10.1007/bf00431330

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“…Usually, Na + and K + quantification is held directly by flame atomic absorption spectroscopy after the sample has been dissolved in distilled water and filtered or by atomic emission spectroscopy, widely used in IA cation group determinations . An alternative is the use of X-ray fluorescence (XRF), using the measured intensity and energy characteristics of X-rays emitted by a sample when irradiated with high-energy electromagnetic radiation. , Energy dispersive X-ray fluorescence (EDXRF) is a fast, low operating cost, nondestructive, and truly multielement analytical technique, providing both qualitative and quantitative results .…”

Section: Introductionmentioning

confidence: 99%

“…17, 18 Studies have shown that lowering blood pressure can be achieved by adopting a diet that replaces common salt by low-sodium salt. 19−21 Usually, Na + and K + quantification is held directly by flame atomic absorption spectroscopy after the sample has been dissolved in distilled water and filtered 22 or by atomic emission spectroscopy, widely used in IA cation group determinations. 23 An alternative is the use of X-ray fluorescence (XRF), using the measured intensity and energy characteristics of X-rays emitted by a sample when irradiated with high-energy electromagnetic radiation.…”

Section: ■ Introductionmentioning

confidence: 99%

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Fast and Direct Na and K Determination in Table, Marine, and Low-Sodium Salts by X-ray Fluorescence and Chemometrics

Da-Col

Bueno

Melquíades

2015

J. Agric. Food Chem.

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X-ray fluorescence (XRF) is a fast, low-cost, nondestructive, and truly multielement analytical technique. The objectives of this study are to quantify the amount of Na(+) and K(+) in samples of table salt (refined, marine, and light) and to compare three different methodologies of quantification using XRF. A fundamental parameter method revealed difficulties in quantifying accurately lighter elements (Z < 22). A univariate methodology based on peak area calibration is an attractive alternative, even though additional steps of data manipulation might consume some time. Quantifications were performed with good correlations for both Na (r = 0.974) and K (r = 0.992). A partial least-squares (PLS) regression method with five latent variables was very fast. Na(+) quantifications provided calibration errors lower than 16% and a correlation of 0.995. Of great concern was the observation of high Na(+) levels in low-sodium salts. The presented application may be performed in a fast and multielement fashion, in accordance with Green Chemistry specifications.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%