Publications

Rapid tests are tools for fast, simple, and relatively inexpensive chemical and biochemical analysis that can be performed in field conditions and do not require expensive instruments, special equipment, or highly qualified personnel.

Rapid tests allow for qualitative and quantitative analysis directly at the sampling site. They are successfully used at industrial and agricultural enterprises, healthcare facilities, and even in household settings…

Currently, disinfectants based on quaternary ammonium compounds (QACs), tertiary amines, guanidines, aldehydes, peroxide, and chlorine-containing components are widely used in medicine, industry, and domestic services.

Disinfectants are classified as products potentially hazardous to humans and the environment, which is why it is crucial to comply with all necessary requirements when working with them. No matter how effective the disinfectants used may be, errors in preparation, improper storage, or application of working solutions can not only fail to deliver the desired results but in some cases cause serious harm to service personnel…

Monitoring the concentration of active substances in working solutions of disinfectants is an important component of effective disinfection measures. Unfortunately, healthcare facility personnel sometimes make a number of errors when storing and using rapid tests, leading to false analysis results. The author hopes this article will be useful for healthcare facility staff and help improve their skills in using rapid tests…

Water is a weak electrolyte and dissociates according to the equation: H₂O ↔ H ⁺ + OH ^– . In pure water at 25 °C, the concentrations of [H⁺] and [OH^–] are equal. In this case, the solution has a neutral reaction. When acid is added to water, the concentration of hydrogen ions increases, while the concentration of hydroxide ions decreases, i.e., [H⁺] > [OH^–]. Such a solution has an acidic reaction. When a base is added, the opposite occurs-the concentration of hydroxide ions increases, while the concentration of hydrogen ions decreases, i.e., [OH^–] > [H⁺], and such a solution has an alkaline reaction…

Chilled poultry carcasses are perishable products. Research has shown that the main microflora causing spoilage is concentrated on the surface of the carcasses.

Before slaughter, the microbial content on the skin of live poultry is approximately 1*10³ CFU/cm². As a result of technological operations (scalding, washing, chilling, etc.), the total microbial contamination of the surface of chilled carcasses can increase to 1*10⁶ CFU/cm². To ensure the final product meets the requirements specified in regulatory documentation and can be stored for 5 days at temperatures between 0 and +4°C, the contamination at the start of storage should not exceed 5*10⁴ CFU/cm².

The most effective way to reduce microbial contamination of carcasses is the technological process of chilling poultry in an ice-water bath containing peracetic acid…

In dairy industry enterprises, incoming raw material control plays a huge role, as it directly affects the quality of the produced products. This raises the issue of detecting inhibitory and neutralizing substances in raw milk.

Neutralizing substances include soda (sodium carbonate and bicarbonate) and ammonium compounds. These substances are used by unscrupulous raw material suppliers to neutralize milk and extend its shelf life. The presence of neutralizing substances in milk leads to a range of technological difficulties, negatively impacting the quality indicators of the final product. Therefore, the presence of neutralizing substances is not permitted in milk supplied to dairy industry enterprises…

A swimming pool is a complex hydraulic structure requiring qualified monitoring and maintenance. Basic analysis of the physicochemical parameters of pool water includes determining the hydrogen index (pH), hardness, alkalinity, and the concentration of disinfectants added to the water. Delta-CT LLC manufactures and sells test strips for monitoring the main physicochemical parameters of water, which are simple and quick to use, provide high analysis accuracy, and are priced lower than imported analogues…

Visual rapid tests are widely used in various industries and sectors of the economy, enabling simple and inexpensive qualitative or semi-quantitative analysis. The general principle of rapid tests is based on the use of color reactions of chromogenic reagents impregnated onto various sorbents. The conditions and format of the analysis ensure a visually observable analytical signal proportional to the amount of the substance being determined. To estimate the analyte concentration in the sample, a color comparison scale is used-a computer simulation of a set of reference samples. The challenges in establishing objective metrological characteristics for visual test methods are associated with the significant contribution of the subjective factor-human eye color perception…

Currently, cleaning and disinfecting agents based on alkaline components are widely used. The final stage of cleaning and disinfection processes involves monitoring the thorough rinsing of residual cleaning agents by determining a parameter called residual alkalinity. Various methods exist for determining residual alkalinity in rinse water and on equipment surfaces.

In the course of daily life, humans are in constant contact with the surrounding world. One of the properties of the material world is color, perceived by humans as a conscious visual sensation. Color perception occurs as a result of the eye being exposed to streams of electromagnetic radiation within the wavelength range of 380 to 780 nm. All types of radiation outside this range are not perceived by the human eye.

Maintenance of beer bottling lines can be divided into two stages-cleaning and disinfection-which are of great practical importance, as they help maintain proper sanitation levels, preserve taste, and prevent beer spoilage.

Acids, alkalis, chelating agents, and surfactants are used as cleaning agents. When cleaning lines, it is essential to follow the recommendations provided by the manufacturers of cleaning agents to achieve maximum effectiveness, completely remove beer stone, organic and mineral deposits, and prevent premature wear of the lines due to corrosion. After removing the cleaning agent from the system, the lines are rinsed with water. To ensure the quality of the rinsing process, it is recommended to monitor residual amounts of acidic and alkaline components from the cleaning agents.

Sanitary treatment is an integral part of the technological process in food production. Technological instructions for sanitary treatment include requirements for monitoring the rinsing of residual amounts of cleaning and disinfecting agents from equipment, utensils, and container surfaces, as these substances can pose health risks to consumers if they enter food products, causing poisoning, allergic reactions, and other health issues. Many countries have regulatory requirements that set maximum permissible concentrations of harmful substances in various food products. Additionally, residual amounts of cleaning and disinfecting agents can negatively affect the organoleptic properties of food-taste, smell, and appearance.

Delta-CT LLC has developed a line of indicator strips for determining residual amounts of cleaning and disinfecting agents in rinse water and on surfaces. The indicator strips, marketed under the brand name “DELTA-CT,” are simple and quick to use, provide high research accuracy, are relatively low-cost, do not require expensive instruments, special equipment, or highly qualified personnel.