Nalco Chemical Company

Christine M Stuart

John E Hoots

Brian V Jenkins

Deborah M Rogers

Terry L Stuebner

Theresa P Cawley

James R Van Camp

Gregory K Bertin

Michael P Sowinski

The invention is a method of monitoring for the presence of certain constituents of food processing streams by measurement of fluorescence. The constituent monitored can be a fluorescing impurity of a food product, or the food product itself if such naturally fluoresces. Moreover, losses of the constituent to be monitored may be determined by concurrent measurement of fluorescence of a fluorescent material added to the food process stream. The method is applicable to the following food processing streams among others: meat, vegetable oil, sugar beet, sugar cane, grain, poultry, fruit and soybean processing streams. Upon determination of a variation of the fluorescing constituent to be measured, the food process can be adjusted accordingly.

Detection of process components in food process streams by fluorescence

A method for determining the adequacy of corrosion prevention treatments applied to metal surfaces is disclosed. The method provides a qualitative determination of corrosion detection using inexpensive equipment. Generally, the method encompasses wetting at least a first and a second absorbent patches capable of retaining a liquid corrosive to metal surfaces to be tested with the corrosive liquid to obtain wetted patches and then contacting a portion of a first metal surface to be tested with the first patch under corrosive conditions and contacting a portion of a second metal surface to be tested with the second patch, wherein the second metal surface having the same composition as the first metal surface has been treated with an effective amount of a corrosion prevention treatment and subjecting the second patch in contact with the second metal surface to the same corrosive conditions as the corrosive conditions applied to the first patch in contact with the first metal surface. The method includes removing the first and the second patches from the first and the second metal surfaces; respectively and, treating the first and the second patches with an effective amount of a tetrazolium compound; and, comparing the amount of stain present on the first patch with the amount of stain present on the second patch, wherein the efficacy of the corrosion prevention treatment can be qualitatively determined.

Field method for determining if adequate corrosion inhibition has been

Growing community of inventors

Wheaton, IL, United States of America

Christine M Stuart