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Density is one of the most frequently measured physical properties in analytical laboratories. It is routinely used for product specification testing, custody transfer calculations, volume correction calculations, process control and quality assurance across the petroleum, fuels, lubricants and chemical industries.

As laboratories seek to improve measurement reliability and demonstrate traceability, the use of Certified Reference Materials (CRMs) has become increasingly important. To support these requirements, ARO Scientific has expanded its range of Density and Relative Density Certified Reference Materials, providing laboratories with traceable reference materials for instrument calibration, verification, quality control and method validation.

From primary-method density standards characterised using ASTM D1480 pycnometer procedures to routine verification standards certified by digital density meter, ARO Scientific provides density reference materials for a wide range of laboratory

Introducing ARO Scientific’s Medical Grade Viscosity Standards

In regulated industries such as pharmaceuticals, medical devices, and biotechnology, measurement accuracy is critical. Viscosity is a key parameter in many formulations, and results must be both reliable and traceable. To support this requirement, ARO Scientific has introduced a new range of Medical Grade Viscosity Standards, developed for use in controlled and compliance-driven environments.

Why Viscosity Accuracy Matters in Medical Applications

Viscosity directly influences product performance, stability, and process consistency. It is particularly relevant in applications such as:

• Drug formulation and delivery systems
• Injectable solutions and biologics
• Medical lubricants and gels
• Manufacturing quality control

Inaccurate viscosity measurements can lead to variability in product behaviour and may compromise both quality and compliance. For this reason, laboratories rely on certified reference materials (CRMs) to verify instrument

Accurate flash point determination is essential for safety, product classification and regulatory compliance across industries handling fuels, lubricants, chemicals and solvents. Reliable results depend on both validated test methods and the use of appropriate certified reference materials (CRMs) for instrument calibration and / or verification.

ARO Scientific has extended its range of flash point CRMs with the introduction of CRM-COC35 and CRM-PMCC35, providing additional options at temperatures for both Cleveland Open Cup (COC) and Pensky-Martens Closed Cup (PMCC) methods.

Importance of Appropriate CRM Selection

Flash point methods such as Cleveland Open Cup (ASTM D92) and Pensky-Martens Closed Cup (ASTM D93) require routine verification using certified reference materials. These materials provide traceable reference values used to confirm instrument performance.

For effective calibration and / or verification, the CRM selected should be close to the expected flash point of the test

1 Introduction: Why Refractive Index CRMs Matter

Refractive index (RI) is a fundamental physical property used throughout analytical chemistry, metrology, quality control laboratories, and industrial process monitoring. It supports material identification, purity assessment, concentration determination (e.g., °Brix), and batch consistency.

In regulated sectors such as pharmaceuticals, food and beverage, and petrochemicals, the reliability of refractive index measurements depends directly on traceable calibration, temperature control, and uncertainty evaluation.

Refractive index certified reference materials (CRMs) provide the metrological foundation for reliable refractometry by supplying certified values with stated uncertainty and SI traceability, as established in peer-reviewed optical metrology literature [1], [4].

2. What Are Refractive Index Certified Reference Materials?

A refractive index CRM is a reference material with a certified refractive index value, assigned using validated

Refractive Index Accreditation Granted
ARO Scientific Ltd is granted dual accreditation status under The United Kingdom Accreditation Service (UKAS) to international standards ISO/IEC 17025 and ISO 17034, CAB No. 27393 for Refractive Index.

Why Refractive Index

Refractive Index is measured for many reasons and is useful for multiple applications. It is a parameter that provides valuable information into determining the concentration of liquid mixtures (i.e. any dissolved mixtures), as well as provide information into the sample’s purity and clarity. This is useful for identification and quality control purposes. Many industries will use refractometers for quality control purposes, particularly within food and beverage industries, from portable hand-held machines to benchtop-based refractometers such as Abbe or automatic digital refractometers. Temperature controlled refractometers are ideal for high-precision refractive index measurements. These are ideal for food, beverage, pharmaceutical,

ARO Scientific achieves ISO 17025 for Calibration

ARO Scientific is proud to announce it has been granted ISO 17025 accreditation for calibration. This new accreditation is in addition to its ISO 17034 and ISO 17025 accreditation for reference material production and testing. This new accreditation now means that ARO Scientific is triple accredited.

This “triple” accreditation demonstrates ARO Scientific’s technical expertise, competence and rigorous quality systems to manufacture and supply high quality Certified Reference Materials.

ISO/IEC 17025
ISO/IEC 17025 is a recognised international standard that specifies the requirements for the competence to carry out testing and or calibrations to a standard dictated by international methods. The international standard requires that an accredited facility comply with all the requirements detailed within the varied sections of the standard. These sections range from assuring the quality of test and calibration results to accommodation, environmental

Introduction: why method validation matters

In today’s highly regulated scientific landscape, method validation is the bedrock of accurate and reproducible analytical results. Whether your laboratory operates in petrochemicals, pharmaceuticals, environmental testing, or food safety, validated methodologies ensure integrity, traceability, and compliance with international standards like ISO/IEC 17025 and regulatory guidelines.

Certified Reference Materials (CRMs) helps you in achieving reliable validation.

What is Method Validation?

Method validation is the process of proving that a given analytical method is suitable for its intended purpose. Regulatory and accreditation bodies require documented validation to confirm the reliability and reproducibility of test results.

Key parameters of method validation include:

• Accuracy
• Precision
• Linearity

At every stage, CRMs play a crucial role in confirming and documenting method performance.

How Certified Reference Materials enhance method validation

Introduction on how ISO 17034 ensures CRM quality

When it comes to analytical chemistry, precision and accuracy are paramount. Laboratories worldwide rely on Whether in pharmaceuticals, environmental testing, or petroleum analysis, the reliability of measurement results depends heavily on the quality of reference materials and calibration standards used in the laboratory. Certified Reference Materials (CRMs), reference materials and calibration standards to ensure accuracy in their measurements, but not all CRMs are manufactured and certified the same. Accreditation under ISO 17034 plays a critical role in differentiating high-quality CRMs from those that lack rigorous validation.

In this blog, we will explore what ISO 17034 is, why it is essential for CRM quality, and how ARO Scientific ensures compliance with this standard to deliver reliable reference materials to laboratories worldwide.

What is ISO 17034

ISO 17034 is the internationally recognised standard that specifies general

Introduction to selecting the right Certified Reference Material (CRM) for your laboratory

In any analytical laboratory, precision and accuracy are paramount. Whether in pharmaceuticals, environmental testing, or petroleum analysis, the reliability of measurement results depends heavily on the quality of reference materials and calibration standards used in the laboratory. Certified Reference Materials (CRMs), reference materials and calibration standards are critical in ensuring accurate, reliable and traceable measurements, selecting the correct CRM for your laboratory's requires careful consideration.

In this blog, we’ll explore the key factors to consider when choosing a CRM and why ARO Scientific’s certified reference materials are trusted by laboratories worldwide.

Why choosing the right CRM matters

Certified Reference Materials (CRMs), reference materials and calibration standards are essential tools for method validation, method verification, instrument calibration, and quality

What is the Cold Filter Plugging Point (CFPP)?

Cold Filter Plugging Point (CFPP) is a critical parameter that determines the lowest temperature at which a given volume of diesel fuel, biodiesel blends, gas oils and other middle distillates can pass through a standardised filtration device. Understanding Cold Filter Plugging Point is crucial for preventing fuel filter plugging and engine problems in cold weather conditions. This guide will provide a brief overview of Cold Filter Plugging Point, including its significance, test methods, and practical implications for industry professionals.

What is the difference between Cloud Point and Cold Filter Plugging Point?

Cloud Point and Cold Filter Plugging Point (CFPP) are both temperature-related parameters for diesel fuel, biodiesel blends, gas oils and other middle distillates, but they serve different purposes. The Cloud Point refers to the temperature at which solid components begin to form a cloudy appearance in the fuel, indicating the onset