S.P.L. Sgrensen not only introduced the p H concept, but in his classical paper from 1909 “Enzymstudien 11” he also described in great detail the colorimetric as well as the potentiometric methods for p H measurement, and he pointed out that two kinds of acidity must be distinguished: Actual acidity and titratable acidity. Previous to Sgrensen the acidity of a solution was usually determined by...

We evaluated in vitro the cariogenic and erosive potential of antitussive liquid oral medications for paediatric use. Fifteen paediatric liquid antitussives were sampled. The endogenous pH was evaluated by potentiometry, titratable acidity was measured according to the method adopted by the Association of Official Analytical Chemists, total soluble solids content (TSSC) readings were performed ...

Humic acids are the most active components of soil organic matter and have been shown to have an hormone-like activity thus stimulating plant growth. The objective of this work was to verify the quantitative and qualitative yield responses of the table grape cv. Italia after the application of a humic acid at various phenological stages. The humic acid used in this study has been extracted from...

OBJECTIVES To evaluate in vitro the endogenous pH, titratable acidity and total soluble solid content (TSSC) of mouthwashes available in the Brazilian market. METHODS The study sample was composed of 10 commercial brands of mouthwashes based on different active ingredients: Cepacol(R), Clinerize(R), Equate(R), Listerine Cool Citrus(R), Oral-B(R), Periogard(R), Peroxyl(R), Plax Overnight(R), P...

background & aim: erosion has been defined as the irreversible loss of dental hard tissue by a chemical process not involving bacteria. dental erosion is an important cause of tooth tissue loss in both children and adults. acids of intrinsic and extrinsic origin (gastric juice and acidic foodstaffs, beverages) are thought to be the main etiologic factors for dental erosion. the reported inciden...

In 2002, the maturity of grapevine was researched on the basis of sugar content, total titratable acidity and pH at seven locations with an undulating topography in four varieties 'Chardonnay', 'Riesling', 'Welschriesling' and 'Sauvignon'. All sampling points were geo-referenced simultaneously with DGPS for creating sugar maps. The significant relationship between the varying altitude above sea...

OBJECTIVE To determine the dental hazards associated with sports supplement drinks by investigating the chemicophysical properties of eight brands of sports drinks. METHODS The pH and titratable acidity against 0.1 M NaOH was measured. Calcium, phosphate, and fluoride concentrations and viscosities of Carbolode, Gatorade, High Five, Isostar, Lucozade Sport Lemon, Lucozade Sport Orange, Maxim,...