Search Results for “conductivity”
Q: We are using Detonox detergent in our ultrasonic baths and are loving it. We use a visual inspection method (cloudiness of solution) to determine when to change the bath and are moving to conductivity and pH. It appears pH stays constant regardless of concentration?
A: As a broad statement, detergent concentration does very little to affect pH due to buffers, as well as salts, micelles, and other constituents. A pH meter wouldn’t be used to control for concentration on anything but very gross scales.
Q. What are important items to include in standard operating procedures for cleaning? A. A large part of successful cleaning relies on having a sound, reproducible procedure. In general, a good SOP should present a list of materials and people…
Q. What does “detergent is the last to leave the equipment surface” after rinsing mean? This seems like a broad statement, can it be supported by literature/documentation?
A. The only source of “detergent last to rinse” that I am aware of is based on the physical behavior of surface active agents and the interchangeable use of the word detergent and surfactant in common usage. More properly you should say the surfactant is the last to rinse. Learn More about Surfactant.
Q: We manufacture medical devices. Can we use our Alconox or Citranox bath solution more than once? How do we know that we need to change the solution?
A: For the highest level of cleanliness, you only use a solution once. In general, in a medical device manufacturing and cleaning operation, a detergent bath will typically easily last for 8 hours.
For example, you can make up a fresh Alconox® or Citranox® solution once a day and then verify that the pH has not changed more …
Q. What is the best way to monitor for bath life extension?
A.To avoid potential for cross contamination, only freshly made up cleaning solutions should be used for the highest levels of critical cleaning. In general, a pH change of 1 unit towards neutral indicates an exhausted cleaning solution. Bath life can be extended. Learn How.