Quantitative Analysis of Mineral Elements in Commercial Pineapple Juices by Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

Abstract

The consumption of fruit juice in the diet has increased in recent years because it contains mineral food supplements and other essential vitamins. In this study, sugar levels and mineral nutrient concentrations were evaluated in 92 commercial pineapple juice samples from Benin and France using inductively coupled plasma mass spectrometry (ICP-MS). The analysis of the data obtained reveals three ranges of concentrations relative to major elements or macro-elements (Ca, Mg), to minor elements or micro-elements (Mn, Fe, Ni, Cu, Zn), and to trace elements (Mo, V, Co, Cr). The concentrations of macro-elements and micro-elements (expressed in µg/L) vary from 11333 to 278000 for Mg, 95200 to 788000 for Ca, 536 to 25344 for Mn, 142 to 85612 for Fe, 5 to 253 for Ni, 5 to 1256 for Cu, and from 43 to 25862 for Zn. The trace elements were found in the concentration ranges (expressed in µg/L) of: 0.23 -12.50 for Vanadium, 0.58 -17.10 for Cobalt, 1.17 -58.70 for Molybdenum and finally 4 -70.5 for Chromium. The sugar levels in the various commercial juices collected in Benin and France vary from 11.0 to 18.5 Brix with an average value of 14.0 Brix. Apart from the heterogeneous nature of the juices produced in Benin production units, mineral and sugar levels were generally in accordance with international standards such as CODEX STAN 182-1993. The transformation of pineapple into fruit juice is a credible alternative for the improvement of pineapple exports, if the marketing strategy is better adapted and the local authorities support the manufacturers of the production chain to improve the quality of juices and highlight their excellent nutritional quality.

Environmental Impacts of Industrial Liquid Discharges from the Food Alcohol Production Plant on the Waters of the Klou River of Logozohè in Benin

“…In addition, the industry has often favored sites near water bodies such as rivers, oceans and seas for the transportation of raw materials, for water supply and for discharges of industrial effluents [3,5]. Thus, for decades, rivers and oceans have been the receptacle of industrial direct discharges, victims of accidental spills and/or polluted by runoff that leached from contaminated areas [6,7]. This is the case in Benin of a Chinese food production plant based on cassava chips set up near the Klou river located in the district of Logozohè, commune of Savalou from where it draws a portion of its water needs and rejects its industrial effluents.…”