Determination the concentration of some metals in imported canned food and chicken stock

Overview

Al-Rajhi measured multiple metals in imported canned foods and chicken stock purchased from supermarkets around Riyadh, Saudi Arabia. The paper reports coded samples rather than public product names, so occurrence values are kept at the imported canned-food/chicken-stock category level. Total arsenic is reported as arsenic (As), and chromium is reported as total chromium (Cr); the paper does not provide inorganic arsenic or hexavalent chromium (Cr-VI) speciation.

Key numbers

Table 1 reports Cu, Fe, Mn, nickel (Ni), Zn, and Cr concentrations in imported canned-food samples:

Table 2 reports cadmium (Cd), aluminum (Al), lead (Pb), As, and Se concentrations:

Additional source-reported values:

• The methods section states that 21 imported canned-food types, including tuna, sardine, and chicken stock, were collected, but Tables 1-2 report 13 coded sample rows.
• The ICP-OES lower detection limit is reported as 0.00001 mg kg−1 on average.
• The abstract reports average concentrations of 0.0007 for Cu, 0.0197 for Fe, 0.0029 for Mn, 0.0018 for Ni, 0.0120 for Zn, 0.0005 for Cr, 0.001 for Cd, 0.0137 for Al, 0.0079 for As, and 0.0167 for Se.
• The abstract and methods mention K, Mg, and V among target elements, but the extracted result tables do not report K, Mg, or V values.

Methods (brief)

Imported canned-food and chicken-stock samples were purchased from supermarkets around Riyadh, transported to the environmental research laboratory at Al Imam Mohammad Ibn Saud Islamic University, dried, ground to a fine powder with a ceramic mill, and stored in polyethylene bags. Approximately 2 g of dry sample was digested with 10 mL high-purity HNO3 and 2 mL hydrogen peroxide, held in a fume cupboard for two days, heated at 80 degrees C until a transparent solution was achieved, filtered, and diluted to 50 mL with distilled water. Metals were measured using a GENESIS ICP optical emission spectrometer from SPECTRO Analytical Instruments. The paper reports total elemental As and total Cr only.

Implications

This source contributes Saudi Arabia-market occurrence context for imported canned foods and chicken stock, including canned fish (tuna, sardine). The sample coding does not identify which values belong to tuna, sardine, or chicken stock, so later extraction should keep the result at broad product-family level unless the original sample key is recovered. Total As cannot be used as inorganic arsenic evidence, and total Cr cannot be used as Cr-VI evidence.

Related evidence

• Fish
• Chicken
• Canned Fish — REDIRECT (Cat 6 → canned-seafood)
• Cadmium
• Chromium
• Copper
• Iron
• Lead
• Arsenic, Total
• Aluminum

Update history

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