Elementary Metal Analysis for Dietary Supplements

Elementary Metal Analysis is a critical quality and safety assessment for dietary supplements, ensuring products are free from harmful levels of toxic metals. This testing verifies compliance with USP, FDA, and international regulatory expectations for consumer safety.

Dietary supplements may contain trace metals originating from raw materials, botanical sources, processing equipment, or environmental exposure. Routine monitoring helps identify and control these risks before products reach the market.

Regulatory Framework

Elemental metal testing for dietary supplements is primarily governed by:

• USP <233> – Elemental Impurities—Procedures
  Defines validated analytical methods such as ICP‑MS and ICP‑OES for accurate metal quantification.

• USP <2232> – Elemental Contaminants in Dietary Supplements
  Establishes permitted daily exposure (PDE) limits and risk‑based evaluation specific to dietary supplements.

• FDA cGMP (21 CFR Part 111)
  Requires manufacturers to ensure dietary supplements are safe, pure, and not contaminated.

Compliance with these standards supports regulatory readiness and consumer confidence.

Commonly Tested Elements

Elementary metal analysis typically includes, but is not limited to:

• Heavy / Toxic Metals Analysis:

  • Lead (Pb)
  • Arsenic (As)
  • Cadmium (Cd)
  • Mercury (Hg)
  • Antimony (Sb)

Analytical Techniques

State‑of‑the‑art instrumentation ensures high sensitivity and accuracy:

• ICP‑MS (Inductively Coupled Plasma–Mass Spectrometry)
  Preferred for ultra‑trace detection and multi‑element analysis.

• ICP‑OES (Inductively Coupled Plasma–Optical Emission Spectroscopy)
  Suitable for higher concentration ranges and routine screening.

Validated digestion and preparation methods are used to accommodate capsules, tablets, powders, liquids, and botanical matrices.

Benefits of Elemental Metal Testing at Unicorn Analytical Services (UAS)

• Helps Protects consumer health and product integrity through accurate results
• Demonstrates USP <2232> and FDA compliance for all our methods
• Supports GMP documentation and audits
• Identifies contamination risks early in the supply chain

Applications

Elementary metal analysis is applicable to:

• Raw materials and botanical ingredients
• Finished Cosmetic and dietary supplement products
• Stability and shelf‑life studies
• Supplier qualification and incoming material testing