Tin Content Determination in Canned Fruits and Vegetables by Hydride Generation Inductively Coupled Plasma Optical Emission Spectrometry

Abstract

Tin content in samples of canned fruits and vegetables was determined by hydride generation inductively coupled plasma atomic emission spectrometry (HG-ICP-OES), and it was compared with results obtained by standard method of flame atomic absorption spectrometry (AAS). Selected tin emission lines intensity was measured in prepared samples after addition of tartaric acid and followed by hydride generation with sodium borohydride solution. The most favorable line at 189.991 nm showed the best detection limit (1.9 μg L−1) and limit of quantification (6.4 μg kg−1). Good linearity and sensitivity were established from time resolved analysis and calibration tests. Analytical accuracy of 98–102% was obtained by recovery study of spiked samples. Method of standard addition was applied for tin determination in samples from fully protected tinplate. Tin presence at low-concentration range was successfully determined. It was shown that tenth times less concentrations of Sn were present in protected cans than in nonprotected or partially protected tinplate.

Evaluation of Optimal Conditions for Determination of Low Tin Content in Fresh and Canned Tomato Samples Using Hydride Generation Inductively Coupled Plasma Optical Emission Spectrometry

“…The Sn concentration in tomatoes from lacquered cans was significantly lower, about 13-fold on average, than those in samples from unlacquered ones. This confirmed the statement that enriched concentrations of tin in canned food are mostly caused by corrosion and leaching of tin from unlacquered cans (Knápek et al 2009;Rafique et al 2009;Trandafir et al 2012;Rončević et al 2012). The results also showed that lacquer inside the cans can keep Sn levels in canned tomatoes at the level observed in fresh samples.…”

“…So far, only one study (Rončević et al 2012) has reported investigation of the best measurement conditions appropriate for determination of tin in a low concentration range in canned fruits and vegetables. Selected tin emission lines were measured in prepared samples by means of HCl treatment and addition of tartaric acid, followed by hydride generation with THB solution.…”

Parameters influencing the migration of trace metals in uncoated fruit cans

“…In our previous study(El Moussawi et al, 2019), Sn was not detected in acidic vegetables stored in coated cans: This clearly shows that lacquering with organic coating minimizes tin dissolution, and this suggests that tin found in uncoated canned fruits is mainly released from the can. This is consistent with previous studies: Ten times less concentrations of Sn were present in fruits stored in protected cans than in non-protected or partially protected tinplate cans(Diviš et al, 2017;Rončević, Benutić, Nemet, & Gabelica, 2012).Our values are in the ranges reported by other authors for canned fruits as indicated inTable 3. In some cases, broad ranges were reported due to different types of cans or brands considered, as well as some discrepancy in storage time and conditions of canned fruits before analysis.…”

Inner filter effect between upconversion nanoparticles and Fe(ii)–1,10-phenanthroline complex for the detection of Sn(ii) and ascorbic acid (AA)

“…[12][13][14] Therefore, it is particularly important to explore an accurate, simple and effective method to detect Sn(II)/Sn(IV). Conventional analysis methods for detecting Sn(II) is atomic absorption spectrometry, 13,14 spectral method, 15 voltammetry, 16,17 and potential method, 18,19 etc. These methods cannot differentiate between samples of Sn(II) and Sn(IV).…”