Sargsyan et al. 2024 - rapid market screening for lead in spices

Sargsyan and colleagues screened 5,007 consumer products from 25 low- and middle-income countries for total lead using portable X-ray fluorescence. The source includes 1,084 loose processed spice samples and is useful as broad geographic screening evidence, especially because the authors report the percentage of spice samples above their 2 ppm reference level.

Key numbers

• The full rapid market screening covered 5,007 products across 11 product types, including metal foodware, ceramic foodware, plastic foodware, cosmetics, toys, paints, spices, sweets, staple dry foods, and herbal/traditional medicines.
• Spices had n=1,084 samples. Table 2 reports minimum non-detect, 25th percentile non-detect, median non-detect, 75th percentile non-detect, maximum 622 ppm Pb, and 2% above the 2 ppm spice reference level.
• The authors state that the highest spice concentrations were found in turmeric and blends.
• Table 1 sets the spice reference level at 2 ppm Pb, described as the highest of several European regulatory levels applying to different spice types.
• Country-level exceedance percentages for spices in Table 3 include Tajikistan 60% (marked as five or fewer samples), Turkey 25% (five or fewer samples), Uttar Pradesh India 12%, Pakistan 9%, Bangladesh 7%, Armenia 4%, Mexico 3%, Vietnam 3%, Tanzania 2%, Colombia 2%, Peru 2%, Egypt 2%, and 0% for many other sampled countries or Indian states.
• The authors note that the XRF minimum detection level for spices is often 2-4 ppm, so some non-detect readings could still have exceeded the 2 ppm reference level.

Methods (brief)

Researchers collected consumer products from markets in selected cities between September 2022 and May 2023. For spices, the protocol favored loose processed spices because powdered material is more homogeneous than whole spices for XRF screening. Samples were analyzed mainly with Thermo Scientific Niton XL3T XRF instruments; Bangladesh used an Olympus Vanta Series C with subset confirmation. Quality control included New York retesting and certified-laboratory confirmation for 354 representative samples. The paper reports total lead screening values, not acid-digestion ICP-MS values for every spice sample.

Implications

Certification: This source supports a broad lead-surveillance signal for the spices row across LMIC markets, but it should be treated as screening evidence because nondetect handling and XRF detection limits compress the lower distribution.

Courses: The paper is useful for explaining why spices can look mostly non-detect in broad screening while still producing severe high-end findings in turmeric and blended spices.

App: Route as broad global spice lead context with explicit market/geography flags. The source supports risk language for loose processed spices, especially turmeric and blends, but not sample-level prediction for a specific country.

Wiki pages this source may touch

• spices
• spices
• turmeric
• lead

Verification notes

• The 1,084 spice samples are part of a wider consumer-product screening study. This source page captures the spice-specific numbers and does not route foodware, toys, paints, or cosmetics as food-occurrence evidence.
• Values are total lead by portable XRF. The paper notes stronger XRF/lab correlation for powdered spices than for some other consumer-product types, but it does not provide full laboratory-confirmed sample-level spice data.
• The country percentages in Table 3 are exceedance rates above the source’s 2 ppm reference level, not country prevalence estimates; some country/product cells are based on five or fewer samples.

Page history

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