Shampoos are most commonly used products for personal hygiene and a staple of hair treatment.
With big market competition, over the years, quality of the products was brought to the highest peaks. Technology of production evolved and new technological advancement brought the best properties of the products to the top.
Not only in terms of properties, but also constant R&D and analysis of new ingredients and their composition in the hair routine.
Shampoos can have different roles; primarily are used for cleaning of the hair and scalp. Other properties developed are aimed at moisture & hydration,detox, dandruff control, etc.
Laboratory evaluation consists of balancing several parameters:
- pH
- water content
- organoleptic
- characterization
- percentage of solid content
- rheological measurements
- dirt dispersion level
- foaming ability
- foam stability
- surface tension
Majority of shampoos are formulated as aqueous solutions, emulsions, liquids, lotions, creams, pastes, gels, dry shampoos, etc.
All shampoo formulations contain a mixture of surfactants (synthetic or natural) as cleansing and foaming agents, excipients (viscosity-controlling agents, emollients, preservatives, etc.), and active ingredients.
Shampoo formulations must be medically safe for long-term usage.
pH of shampoo
pH is the staple of production and quality control.
Most shampoos are pH neutral or on slightly acidic side.
The acceptable pH-range for hair shampoo is 5.0–7.0
pH<7 Acidic solutions cause the cuticle (outer layer) of the hair to shrink and lie flatter on the hair shaft.
- Acidic solutions make the hair smoother Current trend is production of shampoos with lower pH as a new way to minimize hair damage pH>7 Basic solutions cause the cuticle to swell and open up.
- Basic solutions make the hair frizzier pH can be easily measured with a pH meter.
HANNA has variety of options and wide selection of probes that can be adjusted to product consistency and viscosity.
HI2202 edge®
blu Bluetooth®
Smart pH Electrode and Meter
Smart pH Electrode and Meter
Free yourself from wires when performing pH measurements. Hanna Instruments is proud to introduce edge®blu, a pH meter that uses pH electrodes with Bluetooth® Smart technology (Bluetooth 4.0). These pH electrodes connect wirelessly to edge blu or a compatible Apple or Android® device running the Hanna Lab App.
- edge®blu uses HALO™ Bluetooth pH electrodes with a built-in temperature sensor to send measurement data wirelessly to the meter or a compatible Apple or Android device running the Hanna Lab App.
- edge®blu features advanced pH electrode diagnostics to ensure worry free measurements. Diagnostics include Hanna’s exclusive CAL Check feature that alerts users to potential problems during calibration.
- edge®blu features a capacitive touch keypad that gives a distinctive, modern look. The keypad is sensitive enough to be used with laboratory gloves and has a fast response.
Bluetooth Digital pH Electrodes
edge®blu uses HALO® Bluetooth digital pH electrodes. Once a probe is connected, all sensor information including sensor operating specifications and calibration information is transferred. pH electrodes are easy to exchange when you want to change from measuring with one type to another without the need for recalibration.
Water content in shampoo
Determination of water can be determined using a Karl Fisher method for moisture determination.
Water is commonly main ingredient of shampoos, and usually the aim is to get results expressed in % mass.
Water content of shampoo should be between 70 and 90 %.
HI933-02
Volumetric Karl Fischer Titrator
For scientists and professionals who need exact water content determination from 0.01 to 100%, our new generation of the Volumetric Karl Fischer Titrator is engineered to meet or exceed your technical requirements while delivering a lower cost of ownership. With cutting-edge features packed into a compact design, this titrator delivers accurate results and requires less space in the lab. Get accurate water content determination at the push of a button. Designed for the modern lab, this karl fischer titrator is the perfect fit for your testing environment.
The HI933 is an automatic volumetric Karl Fischer titrator with high accuracy, great flexibility and repeatability.
It is designed to perform titrations for a variety of sample types/matrices, allowing the user to obtain both good results and high-speed analysis.
The main attributes of the HI933 titrator are:
- Small footprint, requires minimal bench space
- Casing made with strong, chemically resistant plastic
- Powerful built-in algorithms for termination criteria based on fixed mV endpoint or absolute/relative drift
- Titrant standardization and sample analysis averaging
- Minimized water vapor entry with the
Sealed Solvent System - Balance interface for automatic weighing
- Support for 100 titration methods
- User-customizable reports
- Clearly displayed warning and error messages
Author:
Nives Vinceković Budor
mag.ing.chem.ing.
Nives Vinceković Budor
mag.ing.chem.ing.
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Sources:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5783807/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5783807/
