Executive Summary
A product may pass basic quality tests and still contain hidden contaminants that create serious regulatory, quality, and brand risks. Traditional screening methods can confirm parameters such as appearance, pH, moisture, total nitrogen, or a single marker compound while missing trace mycotoxins, residual solvents, volatile organic compounds (VOCs), undeclared actives, or heavy metals. In complex matrices, the key question is not whether a sample “looks acceptable,” but whether the analytical method is selective and sensitive enough to detect the compounds that truly matter.
CREM Co Labs is an ISO/IEC 17025-accredited contract and R&D laboratory that publicly highlights chemical analysis for food, cosmetics, and natural health products, including contaminant detection, ingredient verification, HPLC, LC-MS, and GC-based services. That makes the right marketing message clear: advanced analytical chemistry turns uncertainty into defensible evidence.[1-3,16]
LC-MS/MS: High-Sensitivity Trace Analysis
Liquid Chromatography–Tandem Mass Spectrometry (LC-MS/MS) combines chromatographic separation with mass-based confirmation, enabling highly selective detection of trace organic contaminants. The technique is widely used for mycotoxins, PFAS, veterinary drug residues, adulterants, and bioactive compounds in difficult matrices such as botanical extracts, supplements, cosmetics, and food products.
Because compounds are confirmed through mass transitions rather than retention time alone, LC-MS/MS provides significantly greater specificity than routine screening approaches. Detection limits may reach low ng/L or low µg/kg levels depending on matrix complexity and method validation.
GC-MS with Thermal Desorption: VOC and Emissions Profiling
When hidden contamination involves volatile or semi-volatile compounds, Gas Chromatography–Mass Spectrometry (GC-MS) with thermal desorption is often the preferred approach. This method concentrates VOCs and residual solvents from air, packaging, polymers, headspace, or sorbent tubes before chromatographic separation and mass spectral identification.
Thermal desorption GC-MS is particularly valuable for off-odor investigations, indoor air analysis, material-emission studies, and packaging evaluations where a general “total VOC” measurement cannot identify the specific chemical source of contamination. Optimized systems commonly achieve low-ppbv detection ranges.
HPLC: Reliable Quantitation for Known Compounds
High-Performance Liquid Chromatography (HPLC) remains one of the most widely used analytical tools for targeted quantitation of known ingredients. It is commonly applied to active compounds, preservatives, vitamins, caffeine, amino acids, organic acids, and stability-indicating assays in beverages, supplements, cosmetic formulations, and finished products.
HPLC offers robust and reproducible quantitative analysis for routine quality control and label claim verification. While less selective than mass spectrometry for trace unknowns, it remains a highly effective method for validated targeted testing.
AAS: Heavy Metals Analysis
Atomic Absorption Spectroscopy (AAS) is an element-specific technique used for heavy metals analysis in foods, botanicals, cosmetics, waters, and natural health products. By measuring light absorption at characteristic elemental wavelengths, AAS can quantify lead, cadmium, arsenic, mercury, and other regulated metals at trace concentrations.
This type of testing is increasingly important for supplier qualification, regulatory compliance, and release testing of botanical and natural products.
Sample-to-Report Analytical Workflow
Different analytical challenges require different technologies. Selecting the appropriate method depends on the contaminant type, matrix complexity, detection limits, and regulatory objective.
Technique Comparison
Technique | Target analytes | Typical detection limits range | Ideal matrices | Turnaround time | Cost range estimate CAD | Regulatory relevance |
LC-MS/MS | Mycotoxins, PFAS, residues, adulterants, bioactives | Low ng/L to low µg/kg or ng/g, depending on matrix and method | Water, food extracts, botanicals, NHPs, cosmetics | ~3-7 business days | ~150-500 | FDA food methods; EPA PFAS; confirmatory trace analysis |
TD-GC-MS | VOCs, residual solvents, odorants, emissions | Commonly low ppbv; sometimes lower with optimized sampling | Air, headspace, packaging, polymers, sorbent tubes | ~3-7 business days | ~175-400 | EPA TO-17; ISO 16000-6 |
HPLC | Known actives, preservatives, caffeine, vitamins, organic acids | Often low mg/L upward in routine UV/DAD work; lower for suitable analytes/detectors | Beverages, supplements, cosmetics, finished products | ~2-5 business days | ~130-300 | Pharmacopeial assays; label claims; stability |
AAS | Pb, Cd, As, Hg, Cu, Zn, Fe, other metals | Flame: ~0.001-0.2 mg/L; furnace: ~0.1-3 µg/L | Digested foods, botanicals, cosmetics, waters, raw materials | ~2-5 business days | ~35-150 | EPA 7000B/7010; Health Canada heavy metals |
Detection limits, pricing, and turnaround depend on analyte list, matrix, sample preparation, and project complexity. The ranges above are representative planning values informed by official methods, public service literature, and CREM’s public tariff rather than fixed quotations.[3-14]
Why Advanced Analytical Chemistry Matters
Advanced analytical methods provide more than pass/fail screening. They deliver:
- Greater chemical specificity
- Lower detection limits
- Matrix-aware method selection
- Defensible QA and regulatory data
- Faster root-cause identification
Real-world contamination events have repeatedly shown the limitations of non-specific testing.
Case Examples
Real-world contamination events have repeatedly shown the limitations of non-specific testing.A protein ingredient can appear to pass a traditional nitrogen screen and still be unsafe. FDA specifically warned that nitrogen-content tests could not distinguish melamine from desired protein, which is why targeted LC-MS/MS methods were needed to confirm melamine and cyanuric acid in food matrices.[19]
An odor complaint can remain unresolved when testing stops at a broad VOC number. Thermal desorption GC-MS has been used to differentiate failed from acceptable materials by identifying trace siloxane contamination, demonstrating how compound-specific volatile analysis can reveal the real root cause.[18]
A “natural” or botanical product can look normal, match paperwork, and still carry elemental risk. Published AAS-based work on Ginkgo biloba products found widespread lead and frequent cadmium and arsenic occurrence, underscoring why metals testing belongs in modern supplier and release qualification.[14,20]
As an ISO/IEC 17025-accredited laboratory, CREM Co Labs supports manufacturers and brand owners with analytical testing designed for quality assurance, compliance, contaminant detection, ingredient verification, and scientific decision-making. The value of modern testing is not simply access to instruments, but selecting the right validated method for the actual risk being evaluated.
References
- CREM Co Labs. CREM Co Labs homepage. Accessed 2026 May 13.
- CREM Co Labs. Chemical Analysis Services for Food, Cosmetic, and Natural Health Products by CREM Co Labs. Accessed 2026 May 13.
- CREM Co Labs. Website test list and price [PDF]. 2024. Accessed 2026 May 13.
- Agilent Technologies. LC/MS fundamentals. Accessed 2026 May 13.
- S. Food and Drug Administration. CAM C-003.03: Determination of mycotoxins in corn, peanut butter, and wheat flour using stable isotope dilution assay and LC-MS/MS. Accessed 2026 May 13.
- S. Environmental Protection Agency. Method 537.1: Determination of selected per- and polyfluorinated alkyl substances in drinking water by SPE and LC/MS/MS. Accessed 2026 May 13.
- Analytical Methods Committee. Thermal desorption part 1: introduction and instrumentation. Anal Methods. 2020;12:3425-3428.
- S. Environmental Protection Agency. Method TO-17: Determination of volatile organic compounds in ambient air using active sampling onto sorbent tubes. Accessed 2026 May 13.
- Shimadzu Corporation. What is HPLC? Accessed 2026 May 13.
- Székelyhidi R, Ajtony Z, Lakatos E, et al. Optimization and validation of HPLC-DAD method for simultaneous analysis of sweeteners, preservatives, and caffeine in sugar-free beverages. Eur Food Res Technol. 2023;249:2797-2805.
- Agilent Technologies. Atomic absorption spectroscopy: principles and technique. Accessed 2026 May 13.
- S. Environmental Protection Agency. SW-846 Method 7000B: Flame Atomic Absorption Spectrophotometry. Accessed 2026 May 13.
- S. Environmental Protection Agency. SW-846 Method 7010: Graphite Furnace Atomic Absorption Spectrophotometry. Accessed 2026 May 13.
- Health Canada. Quality of Natural Health Products Guide. Accessed 2026 May 13.
- S. Food and Drug Administration. Analytical procedures and methods validation for drugs and biologics. 2015.
- International Organization for Standardization. ISO/IEC 17025: General requirements for the competence, impartiality and consistent operation of laboratories. Accessed 2026 May 13.
- International Council for Harmonisation. ICH Q2(R2): Validation of analytical procedures. 2023.
- EAG Laboratories. Analysis of contaminants by thermal desorption GC-MS. Accessed 2026 May 13.
- S. Food and Drug Administration. Laboratory Information Bulletin 4422: Melamine and cyanuric acid residues in foods. Accessed 2026 May 13.
- Rojas P, et al. A health risk assessment of lead and other metals in pharmaceutical herbal products and dietary supplements containing Ginkgo biloba. Int J Environ Res Public Health. 2021;18(16):8285.
- Viana C, Zemolin GM, Dal Molin TR, et al. Detection and determination of undeclared synthetic caffeine in weight loss formulations using HPLC-DAD and UHPLC-MS/MS. J Pharm Anal. 2018;8(6):366-372.