Kvasny Prum. 2008; 54(7-8): 214-217 | DOI: 10.18832/kp2008013

Thermogravimetric determination of moisture in brewing raw materials. Part II. - Possibilities of application of thermogravimetric method to determine the moisture in hops and hop products.Peer-reviewed article

Jiří ČULÍK, Tomáš HORÁK, Marie JURKOVÁ, Pavel ČEJKA, Vladimír KELLNER

Výzkumný ústav pivovarský a sladařský, a. s., Pivovarský ústav Praha, Lípová 15, 120 44 Praha 2

As it has been already mentioned in the first part of this work devoted to the moisture determination in barley, green and finished malt, the thermogravimetric determination of moisture content in natural samples by means of the HR 83 moisture analyser of the company Mettler - Toledo is based on the principles of halogen warm-up and automatic monitoring of the course of the drying curve. This part describes the results related to the elaboration and validation of the method for thermogravimetric moisture determination in whole hops and hop products. At the same time, comparisons of results obtained by this method with the results obtained by the official method of moisture determination in hops and hop products were made (EBC 7.2, MEBAK 5.2.3 and IOB 2.2). Based on the findings it can be stated that the results of the thermogravimetric method coincided with the results obtained by the official method and therefore this moisture meter can be fully recommended for the needs of hop plants and brewery laboratories.As it has been already mentioned in the first part of this work devoted to the moisture determination in barley, green and finished malt, the thermogravimetric determination of moisture content in natural samples by means of the HR 83 moisture analyser of the company Mettler - Toledo is based on the principles of halogen warm-up and automatic monitoring of the course of the drying curve. This part describes the results related to the elaboration and validation of the method for thermogravimetric moisture determination in whole hops and hop products. At the same time, comparisons of results obtained by this method with the results obtained by the official method of moisture determination in hops and hop products were made (EBC 7.2, MEBAK 5.2.3 and IOB 2.2). Based on the findings it can be stated that the results of the thermogravimetric method coincided with the results obtained by the official method and therefore this moisture meter can be fully recommended for the needs of hop plants and brewery laboratories.

Keywords: moisture determination, thermogravimetric method, hops, hop pellets

Published: July 1, 2008