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Latest article on the blog

Measuring pH in shampoo

Published 18. December 2015

Shampoo is a hair care product used for removal of dirt, dandruff, skin particles, oils and other contaminated particles.

As the scientists behind hair care progressed, manufacturers synthesized chemical additives for use in shampoo as fragrance, foaming agents, and colored dyes. Shampoo is now created and structured towards various hair types, as well as to achieve a certain end result, such as the reduction of dandruff or greasy hair. Both the synthetic and natural ingredients used in a shampoo dictate the pH of that particular product. The pH of a shampoo will alter the natural pH of skin and hair, which ideally falls between pH 3 and 5 and pH 4 and 5, respectively, thereby affecting their physical and chemical makeup.


Ocean Acidification: Absorption of Carbon Dioxide

Published 24. September 2015

Carbon dioxide has an effect on many different activities on earth, from the plants on the ground to the clouds in the sky. One major effect resulting from carbon dioxide is the acidification of the world’s water supplies. In a recent article from Environmental News Network researchers from the University of Glasgow show how ocean absorption of carbon dioxide is increasing its acidity, causing shells to become more brittle and vulnerable to severe weather events and predation.

 ocean acidification

Ocean acidification as the process

Ocean acidification is the process in which carbon dioxide from the atmosphere is absorbed by the ocean, reacting with the seawater to form carbonic acid; this formation of carbonic acid is gradually, but surely, lowering the pH of the ocean. Hydrogen ions are released following the formation of carbonic acid, and these hydrogen ions bind to carbonate to form bicarbonate. When this happens, carbonite concentrations decrease, making it difficult for calcifying species such as mussels to build their shells of calcium carbonate.

“Mussels draw bicarbonate ions from seawater and use proteins in their bodies to make crystals of calcium carbonate to form their two-layer shells. In more acidic water, there are less bicarbonate ions available for the mussels to make their shells.”

Using pH meter for measuring water’s pH

While this may seem like a modest problem, the hindrance of growth, development, and reproduction of smaller marine organisms such as shellfish, krill, and plankton can result in a breakdown of marine food webs. Not only would this affect larger marine organisms, but it would ultimately affect the commercial fishing industry and the livelihood of those in the industry. One way in which we can detect the increase of carbon dioxide is by measurement of our water’s pH by use of a pH meter.

The measurement of pH can help users better understand the chemistry of our oceans. Hanna Instruments carries a variety of pH meters suitable for measuring the pH in the lab, in the field, and on the go.

Portable Meters


HI9829 Multiparameter Portable Meter

Rugged, waterproof and easy to use, the HI 9829 is the ideal meters for field measurements of lakes, rivers and seas. Both meters display 1 to 12 parameters simultaneously from up to 15 user selectable parameters.


HI2020 edge Multiparameter Meter

Edge’s groundbreaking design is the culmination of Hanna’s vision, design capabilities, integrated production and world class R&D. edge is a single meter that can measure pH, Conductivity, and Dissolved Oxygen and is incredibly easy to use.


Benchtop Meters


HI2212 Benchtop Meter with Three Point Calibration

The HI 2212 is a pH and temperature benchtop meter. Calibration can be performed at up to three-points using five standard and two custom buffers. This instrument features manual or automatic temperature compensation with the HI 7662 temperature probe.



HI22091 pH/mV Meter with Manual Temperature Compensation

The HI 22091 pH/mV Meter with Manual Temperature Compensation (MTC) and Analog Output provides a simple to use, cost effective method of measuring pH. The HI 22091 replaces PH 209R and features a large, easy to read LCD, built-in solution holders and an attractive redesigned case.


pH Testers


HI98129 pH/Conductivity/TDS Tester

The HI98129 is a highly accurate, waterproof pH tester that can also measure EC/TDS and temperature. This floating, waterproof combination tester has an easy to read, LCD and an automatic shut-off. In addition, pH and EC/TDS readings are automatically temperature-compensated to prevent temperature related variations in your measurements.



HI11312 HALO™ pH Probe with Bluetooth® Smart Technology

HALO™ is the world's first professional pH probe with Bluetooth® Smart technology (Bluetooth® 4.0). It is a high quality, double junction, refillable glass pH probe with a built-in temperature sensor that can be used virtually anywhere: in the field, laboratory or classroom. Its flexibility and ease of use will revolutionize the way pH is measured. HALO™ transmits measurement data directly to an iPad® (not included) running the Hanna Lab App.


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Ulica 15. Maja 19a

6000 Koper - Slovenija

Tel: +386 (0) 59029902/3

Fax: +386 (0) 59029898

VAT: SI92346669

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