The phrase "adulteration by" is correct and usable in written English.
You would use this phrase to refer to the act of making something impure or lower in quality by the addition of inferior or undesirable ingredients. For example, "The quality of the food had been compromised by adulteration by preservatives."
Coffee as high-price commodity is quite vulnerable to adulteration by cheaper roasted grains.
A combination of kjeldahl and spectrophotometric method has been suggested to detect milk adulteration by melamine, urea and ammonium sulphate (Virginia de Lourdes et al. 2013).
Saffron (Crocus sativus L ., one of the most important and expensive medicinal spice products traded internationally, is subject to adulteration by design or default with safflower stamens and corn stigmas, leading to poor quality of saffron samples.
The aim of this study was to design a strategy to investigate the adulteration of frescal (fresh) goat cheeses available in the Rio de Janeiro retail market, combining analysis of cheese composition and the perception of adulteration by consumers.
Turmeric powder (Curcuma longa L ., an important medicinal spice product traded internationally, is subjected to adulteration by design or default with powders of related curcumin containing wild species like Curcuma zedoaria and Curcuma malabarica leading to toxicity and poor quality of the produce.
One of the big problems of milk processing industry and/or distributors is the liquid or dehydrated milk adulteration by adding cheese whey.
Fifth, adulteration of CHMs by prescription drugs and heavy metals and contamination of CHMs by heavy metals have always been a concern in studying CHMs.
Food scares erupted throughout the 19th century, caused mainly by adulteration, and the physique of the poor spoke eloquently of their undernourishment on jam and margarine.
Moreover, the proline content is an indicator for honey and can also reveal adulteration, as indicated by a proline level of less than 183 mg/kg [ 24].
Moreover, the Taiwan Food and Drug Administration FDAA) has conducted annual screening of adulteration of CHMs by prescription drugs and periodically measured the concentrations of various heavy metals in raw materials of CHMs.
Adulteration of milk by adding cheese whey is economically attractive because cheese whey cost is four to five times lower than milk and it does not adversely affect the sensory perception of product.
