Selenium in selected samples of infant formulas and milk commercialized in Belgium and Brazil: Total content, speciation and estimated intake

Certification of New Selenium-Enriched Yeast and Supplement Reference Materials for Selenomethionine Using Two Independent Measurement Strategies

“…Due to the structural and property similarities between selenium and arsenic species, this experiment initially attempted to utilize a PRP-X100 anion exchange column as the chromatographic column. Diammonium hydrogen phosphate ( Figure 1 a), an ideal mobile phase for arsenic speciation analysis, was compared with two previously reported mobile phases (citric acid [ 6 ] ( Figure 1 b) and ammonium dihydrogen phosphate [ 27 ] ( Figure 1 c)). Through the optimization of the concentration, pH, and flow rate of different mobile phases, the results demonstrate that the chromatographic separation and analysis time were optimal when using diammonium hydrogen phosphate as the mobile phase.…”

“…The utilization rate of organic selenium in animal bodies is much higher than that of inorganic selenium [ 5 ]. An insufficient or excessive intake of selenium may cause adverse effects on the human body [ 6 ]. Natural foods, such as selenium-rich plants, are an effective way to increase selenium intake, while they may not be enough to meet the recommended daily intake for the human body [ 7 ].…”

Atomic spectrometry update: review of advances in the analysis of clinical and biological materials, foods and beverages

“…8.1.4 Selenium. Infant formula and milks from Brazil and Belgium were analysed for total Se and Se species, by de Paiva et al 229 For total Se, samples underwent MAD based on the AOAC method 2015.06 and the digests were analysed using ICP-QQQ-MS. The use of O 2 allowed a mass shi from m/z 78 to m/z 94 (SeO + ), thus improving sensitivity, under these conditions, an LOQ of 10 mg kg −1 was achieved.…”