It is now several decades that lingocelluloses are investigated to produce ethanol, methane, hydrogen, butanol, citric acid, lactic acid, etc. However, the structure of these materials are difficult to open by enzymes and microorganisms and therefore pretreatment is used. There are several analytical methods that used in this aspects. We have explained these analytical methods and critically reviewed them in two papers. The first half of this review is now presented in this publication that is open access in Bioresource Technology: