SPEX CertiPrep 2023 — Heavy metals in hot sauce and chili powder (US)

An industry application note from SPEX CertiPrep (ZeptoMetrix) analysed 7 chili powder blends and 6 red pepper hot sauces purchased from US retail outlets by ICP-MS after cryogenic grinding and microwave digestion. The most prevalent heavy metal in chili powders was chromium (3.1–7.0 µg/g), with the highest concentrations found in one low-price retail sample. Lead, cadmium, and arsenic were also detected. For hot sauces, lead and chromium were consistently present in all samples; the highest exposure concern was an individual-serving fast-food packet sample, where two packets (20 g) contributed approximately 20.6 µg Pb and 63 µg Cr, each approaching 30% of an adult allowable-daily-limit comparison used by the source.

Key numbers

Chili powder concentrations (n=7, all red pepper/chili blends of unknown composition):

• Cr: 3.1–7.0 µg/g (highest in one low-price retail sample)
• Cd: up to 1.2 µg/g (same low-price retail sample)
• As (total): up to 0.4 µg/g (same low-price retail sample)
• Pb: up to 1.6 µg/g (highest in organic chili powder); dollar-store sample <1 µg/g
• Hg: not found in significant concentrations in red pepper products

Hot sauce concentrations and exposure (n=6):

• Pb and Cr consistently present in all hot sauces
• Individual-serving fast-food hot sauce packets (~10 g/packet): 2 packets (20 g serving) = 20.6 µg Pb and 63 µg Cr (~30% of the source’s adult daily allowable-limit comparison for each element)
• Some sauces also contained measurable As and Cd
• Hg: not detected at significant concentrations

Contextual comparison across all spices tested (beyond red pepper/chili):

• Red pepper/chili had the highest As and Cd of all spices tested
• Only cinnamon and turmeric samples exceeded red pepper/chili for highest Pb levels

Method: Cryogenic grinding; microwave digestion (CEM Mars 5, 0.2 g sample, 10 mL HNO3, 15 min ramp to 210°C, 15 min hold, with HF for high-silica samples); Agilent ICP-MS 7700 (Meinhard nebulizer, cyclonic spray chamber); SPEX CertiPrep CLMS-1/2/3/4 multi-element standards; normal mode (air) and collision mode (helium). LOD/LOQ not explicitly reported in the application note.

Note: This is an industry application note demonstrating analytical instrumentation capabilities, not a peer-reviewed research publication. No uncertainty estimates, no certified reference material recoveries explicitly reported beyond instrument performance claims. Sample selection was convenience-based (retail purchasing). Use as indicative data for spice contamination screening; verify against peer-reviewed sources for quantitative risk assessment.

Methods (brief)

Industry application note by SPEX CertiPrep (a standards and certified reference material company, now distributed by ZeptoMetrix). Samples were convenience-purchased at various US retail outlets. No experimental design, statistical analysis, or uncertainty reporting. ICP-MS method with cryogenic grinding and microwave digestion is consistent with standard analytical practice. The note reports on red pepper products as a subset of a broader spice contamination study; other spices (cinnamon, turmeric) were also tested but are not the focus of this batch.

Implications

Certification: Reports Pb, Cd, Cr, and tAs presence in US-retail chili powders and hot sauces, with one low-price retail chili-powder sample showing the highest Cr, Cd, and tAs values. The organic chili-powder sample showed the highest Pb (1.6 µg/g). The serving-size exposure framing for hot sauce packets is useful occurrence context. These data are indicative rather than definitive; A-tier peer-reviewed spice studies should anchor quantitative interpretation.

Courses: Useful for illustrating that price and “organic” designation were not protective markers in this small convenience sample. The contrast between dry spice concentration vs serving-size exposure (high concentration in powder, but low serving; lower concentration in liquid sauce, but higher serving) is a key risk-communication teaching point.

App: Chili powder Pb range up to 1.6 µg/g (1,600 ppb); Cr up to 7.0 µg/g (7,000 ppb); Cd up to 1.2 µg/g (1,200 ppb); tAs up to 0.4 µg/g (400 ppb). Flag as B-tier indicator data pending peer-reviewed confirmation.

Wiki pages this source may touch

• spices
• spices
• condiments-general
• lead
• cadmium
• arsenic-total
• chromium
• mercury-total

Verification notes

• Cross-vendor audit (Codex, 2026-05-17) removed non-existent chili-pepper and hot-sauce route targets, broadened frontmatter to current spices and condiments-general slugs, added total mercury scope because the note explicitly discusses mercury as not significant, and generalized the fast-food packet descriptor under the strict Part 12 firewall.
• Source and methods vendor names are retained only for citation and scientific reproducibility context under Part 12 Exception 2; no sampled-product brand names are listed.
• The application note does not report inorganic arsenic, chromium(VI), or methylmercury speciation; this page treats arsenic as total arsenic (tAs), chromium as total chromium (Cr), and mercury as total mercury (tHg).

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