Reaffirmed 2022

NATIONAL FOREWORD

This Indian Standard (Part 29/Sec 2) which is identical with ISO 11024-2 : 1998 ‘Essential oils — General guidance on chromatographic profiles — Part 2: Utilization of chromatographic profiles of samples of essential oils’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Fragrance and Flavour Sectional Committee and approval of the Petroleum, Coal and Related Products Division Council.

ISO 11024 has been published by ISO in two parts under the general title ‘Essential oils — General guidance on chromatographic profiles’. The Committee has decided to adopt these ISO Standards as two different sections of this new part of Indian Standard under dual numbering system and while adopting, the main title of the existing series of standard, IS 326, has been retained.

The other section of this standard is:

Section 1 Preparation of chromatographic profiles for presentation in standards

Gas Liquid Chromatography (GLC) is a form of chromatography which accomplishes the separation of a vapourizable sample by partitioning the sample between a mobile gas phase and a stationary liquid phase usually coated on a solid support. Determination of the chromatographic profile of an essential oil is one of the important aspect of GLC. This standard provides general guidelines on the determination of the chromatographic profile of an essential oil by gas chromatography while other section of this standard provide guidelines for utilization of chromatographic profile for determination of the compliance of a chromatographic profile of a sample of essential oils with the reference chromatographic profile.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appears referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.