ANALySIS ON detergentS
Chemical tests
| Powder detergent | Liquid detergent | Washing soap |
The laboratory boasts a long experience in the detergent division thanks to a high number of determination executed, and a part of them are Sinal accredited.
When possible the laboratory uses official methods, as alternative the laboratory has studied a series of internal methods allowing a complete characterization of formulates.
All the methods include the estimation of the uncertainty of measure, necessary element for the evaluation of the difference between two products or for the evaluation of the conformity of a product to specifications.
The types of analysed detergents cover the whole market and are:
- Detergents for clothes
- Adjuvants for washing
- Detergents for dishes
- Detergents for hard surfaces
- Washing soaps
From the analytical point of view they can be grouped into three fundamental classes:
- Powders
- Liquids
- Solids
These detergents are largely used in washing machine and in dishwasher in form of powders or tablets.
The analysis performed by the laboratory include:- active matter
- ethanol-soluble substances
- anionic surface-active agents sulphates and sulphonates
- soaps
- nonionic surface active agents
- bleaching agents
- active oxigen (perborate, percarbonate)
- TAED
- Sequestering agents
- EDTA
- Builders
- Carbonates
- zeolites
- silicates
- Boron (borates)
- Phosphorus (phosphates, phosphonates)
- Citrates
- Fillers
- sulphates
- chemical/ physical characterization
- optical bleaching
- water (KF)
- Determination of preservatives
- Volumic mass (density)
- pH
- net content
- Determination of heavy metals by ICP/MS
- Determination of allergic flavouring substances by GC-MS
As follows the analysis of the ADJUVANTS FOR WASHING (both in powder and liquid) are listed:
- Softeners characterized by the presence of cationic surface active agents
- Polishes where it is important the determination of the non ionic surface active agents and turbidity point
- Bleaching (liquid and powdered) where the active principle is in the majority of the cases a base of active oxigen (perborates, percarbonates)
- Anti-limescale or liquid deconcentrator where the laboratory detect the used sequestrants (citric acid, zeolites,..)
Liquid detergents are divided in hand washing detergents, washing machine detergents, dishwashing detergents and detergents for hard surfaces depending on their use.
In the liquid detergents for laundry the following analysis are performed:
- active matter
- ethanol-soluble substances
- anionic surface-active agents sulphates and sulphonates
- soaps
- nonionic surface active agents
- amphoteric surface active agents
- solvents
- alcohols
- glycols
- builder/sequestrants
- Carbonates
- citrates
- EDTA
- chemical/ physical characterization
- mass of a volume unit
- dry residue
- pH
- acidity
- total free alkalinity
The liquid products for dishes and hard surfaces have very different formulations depending on their use; the laboratory performs a basic analytical profile completed by the characterization of the active principles typical of the product:
- basic profile
- pH
- dry residue
- substances soluble in ethanol
- Volumic mass (density)
- Brookfield viscosity ( LVT and RVT)
- net content
- test of bottle capacity to find possible losses
- active principles analysis
- anionic surface-active agents sulphates and sulphonates
- nonionic surface active agents
- amphoteric surface active agents
- soap
- citric acid
- ammonia
- acidity
- total free alkalinity
- active chlorine
- active oxigen
- solvent (alcohols, glycols)
- glycerine
- EDTA
- Benzalkonium chloride
- Chlorhexidine digluconate
- flavouring substances
- metals
- net content
- pH
- humidity
- total fatty acids
- fatty acids composition (chromatographic)
- titanium dioxide
- chloride
- iodine number
- saponification number
- acidity number
- neutralization number
- total alkalinity
- total free alkali
- glycerine
- not saponifiable fraction
- neutral fat
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