Use of the gravimetric diluter in microbiological work

Merja Manninen, D. Fung

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)


Manual dilutions of food samples (e.g., 1:10 dilution) for microbiological investigations are cumbersome. We tested an automatic diluter (Model GD-600 Gravimetric Diluter, Spiral System, Inc., Bethesda, MD) for accuracy and sterility for microbiological work and found that the system provided ±0.1 to +0.2 g of accuracy in delivering a commanded amount of diluent. The delivered diluent was essentially sterile, with a few samples giving 1 to 4 colonies per ml after plating. With this system, weighing and dilution are fast, easy, and accurate.
Original languageEnglish
Pages (from-to)59-61
JournalJournal of Food Protection
Issue number1
Publication statusPublished - 1992
MoE publication typeA1 Journal article-refereed


Dive into the research topics of 'Use of the gravimetric diluter in microbiological work'. Together they form a unique fingerprint.

Cite this