ISO 22980:2020 タバコ—ニコチンとしての総アルカロイドの含有量の測定— KSCN / DCICを使用した連続フロー分析法 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 126, Tobacco and tobacco products, Subcommittee SC 2, Leaf tobacco.

Introduction

In 2014, the CORESTA Routine Analytical Chemistry Sub-Group (RAC) undertook a collaborative study of two methods for the determination of total alkaloids in tobacco (as nicotine) by segmented continuous-flow analysis. The two methods are ISO 15152 and a new method proposed by the China National Tobacco Quality Supervision and Test Center. In ISO 15152, cyanogen chloride is generated in situ by the reaction of potassium cyanide and chloramine T. The proposed method eliminates the use of the potassium cyanide (KCN) by employing potassium thiocyanate (KSCN) with sodium dichloroisocyanurate dihydrate (DCIC) for colour development. Each method was tested using water extracted tobacco and 5 % acetic acid extracted tobacco. Calibration standards were prepared with the same extraction solutions.

1 Scope

This document specifies a method for the determination of the content of total alkaloids as nicotine in tobacco by continuous-flow analysis. This method is applicable to leaf samples, stems, reconstituted tobacco sheet materials and tobacco blends.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

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Bibliography