CRM Ba, Ca, K, Li, Mg, Na, NH4 + , Sr - Aqueous calibration solution ASTASOL® AN9103MHIC

Significance of the topic

The preparation and certification of aqueous calibration solutions with well defined analyte concentrations is fundamental for the validity and comparability of analytical results across laboratories and techniques. Certified reference materials ensure traceability to SI units, reduce methodological bias and support regulatory compliance.

Objectives and overview of the study

This certificate describes the production and validation of an aqueous multielement calibration solution containing eight inorganic analytes at 100 mg per liter each. The goal is to provide a homogenous and stable calibration standard for atomic spectrometry and ion chromatography methods with defined uncertainties and traceability.

Methodology and instrumentation

The solution was gravimetrically prepared using high purity nitrate salts and ultrapure water. Concentrations were assigned by gravimetric mass determination and confirmed by primary analytical methods including titrimetric procedures and instrumental techniques. Homogeneity and stability assessments were conducted over the declared shelf life.

Used instrumentation

• Atomic absorption spectrometer
• Atomic emission spectrometer
• Inductively coupled plasma optical emission spectrometer
• Inductively coupled plasma mass spectrometer
• Ion chromatograph
• Titration apparatus for complexometric and acid base determinations
• Density meter

Main results and discussion

The certified concentration of each element is 100.0 mg per liter with an expanded uncertainty of 0.2 mg per liter at 20 degrees Celsius. The solution density at 20 degrees Celsius is 1.0003 g per cubic centimeter with expanded uncertainty 0.0005. Trace impurities were quantified to establish background levels but are not intended for calibration. Homogeneity tests confirmed uniform composition among bottles and stability trials demonstrated retention of certified values under recommended storage conditions.

Benefits and practical applications of the method

• Reliable calibration for quantitative analysis by AAS AES ICP OES ICP MS
• Support of method validation in environmental monitoring industrial quality control and research laboratories
• Direct traceability to kilogram SI unit through gravimetric preparation
• Reduced uncertainty budgets and improved result comparability

Future trends and potential applications

Advancements may include preparation of multi-analyte solutions covering a broader concentration range extension to speciation standards and integration with digital certificate distribution. Enhanced stability studies under extreme conditions and miniaturized calibration kits for field analysis represent promising directions.

Conclusion

The ASTASOL AN9103MHIC certified reference material provides a high quality aqueous multielement standard with demonstrated traceability homogeneity and stability. Its application ensures accurate calibration and validation of analytical methods across diverse fields.

References

• SRM NIST 3104a
• SRM NIST 928
• SRM NIST 3109a
• SRM NIST 3141a
• SRM NIST 3129a
• SRM NIST 3131a
• SRM NIST 3152a
• SRM NIST 3153a