ICP-OES in practice — why is it the gold standard in micro- and macroelement analysis?

Introduction

Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) is one of the most highly regarded methods for elemental determination in biological samples, food, water, and environmental materials.
Thanks to its high sensitivity, repeatability, and wide dynamic range, ICP-OES is now widely used in toxicological, environmental, and biochemical laboratories.

In hair mineral analysis, this technology enables the acquisition of reliable, stable, and precise data on long-term mineral trends and exposure to heavy metals.

How does ICP-OES work? — a scientific explanation

ICP-OES uses an argon plasma with a temperature of approximately 7,000–10,000 K to excite atoms and ions present in the sample. Once excited, the particles emit radiation at characteristic wavelengths — the spectrometer records these emissions and converts them into elemental concentrations.

As a result, ICP-OES enables the determination of elements at ppm–ppb levels while maintaining high measurement stability.

The process includes:

1. Nebulization – introducing the sample solution into the spray chamber.
2. Transport of the aerosol into the plasma.
3. Excitation of atoms and ions.
4. Registration of optical emission at specific wavelengths.
5. Conversion of emission line intensities into concentrations using calibration curves.

Thanks to this, ICP-OES allows elemental determination at ppm–ppb levels while maintaining high measurement stability.

Why is ICP-OES a reference technology in elemental analysis?

✔ High sensitivity and wide dynamic range
ICP-OES can detect concentrations from single ppb up to several thousand ppm, which is crucial in biological analysis.

✔ Repeatability and stability
Thanks to high-temperature plasma, results are characterized by low variability between measurements.

✔ Simultaneous multi-element analysis
In a single analysis, dozens of elements can be determined simultaneously — from macroelements (Ca, Mg, Na, K), through trace elements (Zn, Cu, Se, Mn), to heavy metals (Pb, Hg, As, Cd).

✔ Reduced interferences
Plasma eliminates most matrix interferences that are difficult to control in lower-energy techniques (e.g., AAS).

✔ Compliance with international standards
ICP-OES is recommended by:

• EPA (Environmental Protection Agency),
• WHO (World Health Organization),
• ISO (International Organization for Standardization),
• ATSDR (Agency for Toxic Substances and Disease Registry).

ICP-OES in hair mineral analysis — the Mineralco approach

In HTMA (Hair Tissue Mineral Analysis), ICP-OES provides access to the most accurate data regarding:

• current mineral status,
• chronic deficiencies and excesses,
• metabolic ratios (Ca/Mg, Na/K, Zn/Cu),
• exposure to heavy metals (Pb, Hg, As, Cd),
• disturbances in detoxification, metabolism, and oxidative stress.

At Mineralco, we apply:

✔ proprietary sample preparation protocols
ensuring reduction of external contamination,

✔ regular calibration curves
(standards renewed in accordance with QA/QC protocols),

✔ double quality control (blanks + spikes)

✔ a stable methodology compliant with the ICP-OES Gold Standard.

This ensures repeatable and reliable analytical results.

ICP-OES vs AAS vs XRF — why does ICP win?

In biology, toxicology, and environmental research, ICP-OES remains the gold standard.

How does ICP-OES support practitioners, clinics, and scientific partners?

ICP-OES enables:

• monitoring long-term mineral trends,
• identification of exposure to heavy metals,
• assessment of supplementation effectiveness,
• analysis of dietary and environmental impact,
• comparison of metabolic status in humans and animals.

Therefore, the method is widely used by:

• clinical dietitians,
• functional medicine specialists,
• veterinarians,
• wellness centers,
• environmental laboratories,
• research institutions.

Summary

ICP-OES remains one of the most accurate methods of elemental analysis.
It is a technology that supports science, practitioners, and B2B partners in making informed, data-driven decisions — both in human and animal health.

Mineralco, as part of the Lifeline Group, uses ICP-OES as the core of its operations, delivering precise and repeatable results in accordance with international standards.

References / Scientific sources

1. Boss, C. B., & Fredeen, K. J. (2004). Concepts, Instrumentation and Techniques in Inductively Coupled Plasma Optical Emission Spectrometry. PerkinElmer.
2. Al-Ammar, A., Gupta, R. K., & Barnes, R. M. (2000). Improving ICP-OES Detection Limits. Spectrochimica Acta Part B.
3. Todoli, J. L., & Mermet, J. M. (2006). Sample Introduction Systems for ICP-AES and ICP-MS. Elsevier.
4. US EPA Method 6010D: Inductively Coupled Plasma Optical Emission Spectrometry.
5. WHO Environmental Health Criteria 224 — Biomonitoring of Metals.
6. ATSDR (Agency for Toxic Substances and Disease Registry) — Toxicological Profiles.
7. Miller, J. N., & Miller, J. C. (2010). Statistics and Chemometrics for Analytical Chemistry. Pearson.
8. Nölte, J. (2003). ICP Emission Spectrometry: A Practical Guide. Wiley-VCH.