Liquid Detergent Analyses: Mandatory Tests for Product Quality, Safety, and Performance
Liquid detergents are among the most frequently used categories of cleaning products, finding widespread application in both household and industrial settings. The efficacy of a liquid detergent depends on numerous technical parameters, including its contained surfactants, pH values, viscosity, enzyme activity, foam formation, and environmental impact.
We conduct comprehensive analyses to demonstrate product suitability concerning both consumer safety and regulatory requirements. These analyses not only confirm product performance but also reveal formulation stability, microbiological safety, and environmental impact.
Tests and Analyses of Liquid Detergents
pH Analysis: Determines the acidic or basic nature of the liquid detergent. The pH value is crucial for skin compatibility, product safety, stability, and shelf life. Incorrect pH values can lead to both formulation instability and skin irritation for the user.
Density Measurement: Density indicates the amount of substance contained within a specific volume of the detergent. Density measurement is performed to ensure formula consistency, verify filling volumes, and control production processes.
Viscosity Analysis: Viscosity determines the flow properties of the liquid detergent. Insufficient viscosity can result in a watery product appearance, whereas excessive viscosity can hinder its application. Furthermore, viscosity is one of the most crucial indicators of product stability.
Moisture/Dry Matter Determination: This analysis is essential for determining the actual active ingredient content of the detergent. Products with a low dry matter content may exhibit reduced cleaning efficacy. The accuracy of the production formulation is controlled using this parameter.
Total Active Matter (TAM) Analysis: This indicates the total proportion of surface-active substances that determine cleaning power. A higher TAM value correlates with stronger product performance. The accuracy of manufacturer specifications is verified through this analysis.
Determination of Anionic and Non-ionic Surfactants: The anionic and non-ionic surfactants, which constitute the primary cleaning power of the detergent, are measured both individually and collectively. This analysis is essential for formulation efficacy and performance assurance.
Analysis of Cationic Surfactants: Cationic surfactants may be incorporated into the formula, particularly for their softening, antistatic, or disinfectant properties. This analysis determines the accuracy and quantity of cationic substances present in the formula.
EDTA/Chelating Agent Determination: The quantity of chelating agents, utilized to enhance the formula's resistance to water hardness, is analyzed. The proportion of EDTA directly impacts the detergent's performance in hard water.
Enzyme Activity Analysis: The efficacy of enzymes such as protease, amylase, and lipase is measured to assess the detergent's stain removal capability. Enzyme stability is a crucial indicator of product shelf life.
Fragrance and Color Stability: The resistance of dyes and fragrance molecules to temporal changes is measured. Loss of scent and color under UV light, at various temperatures, and under different storage conditions is investigated.
Foam Test: The foam volume and the duration of foam stability are evaluated. Foaming behavior is a significant factor in product selection, particularly for consumer goods.
Stain Removal Efficiency: The detergent's performance under realistic application conditions is analyzed using standardized stains (e.g., tea, coffee, oil, sauce, grass).
Grease Removal Efficiency: Special test substances or surfaces are employed to measure the product's performance, particularly against grease-based soiling. This is a critical parameter for industrial products.
Hard Water Performance Test: The detergent's performance in hard water (containing Ca²⁺ and Mg²⁺ ions) is evaluated. As hard water can diminish the efficacy of surfactants, this test is particularly crucial.
Biodegradability Test: This test indicates whether the detergent is environmentally friendly and if its surfactants are biodegradable. This is mandated by European and national environmental regulations.
Toxicity Tests (OECD 201–203): These tests determine the potential harmful effects of the detergent on aquatic organisms. Conducted under OECD standards, these tests form the basis for environmental compatibility assessment.
Microbiological Load Analysis: It is verified whether the contamination by microorganisms such as bacteria, yeasts, and molds remains within permissible limits. As liquid detergents contain water, microbiological stability is of paramount importance.
Stability Tests: The product is tested under various temperature, light, and temporal conditions to assess its shelf life. It is examined for issues such as phase separation, viscosity changes, or color alterations.
Packaging and Labeling Conformity: The physical integrity of the packaging, its seal-tightness, the accuracy of label information, and compliance with regulations are verified. Documentary conformity is particularly crucial for export products.
SDS (Safety Data Sheet) – Accuracy Verification: The content of the product's SDS document, its hazard classification, and its consistency with the results of technical data analysis are verified. An inaccurate SDS can pose both a legal and a safety risk.
Related Projects
