Standard No.:	YC/T 373-2010
English Name:	Determination of benzene toluene ethylbenzene and xylene in polypropylene fiber tow and polypropylene fiber tow filter rod—Gas chromatography-mass spectrometry method
Chinese Name:	丙纤丝束及丙纤滤棒 苯、甲苯、乙苯和二甲苯残留量的测定 气相色谱-质谱联用法
Chinese Classification:	X85    Tobacco curing in general
Professional Classification:	YC    Professional Standard - Tobacco
Source Content Issued by:	china tobacco
Issued on:	2010-12-1
Implemented on:	2011-1-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	6000 words
Translation Price(USD):	140.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the method for determination of benzene, toluene, ethylbenzene and xylene in polypropylene fiber tow and polypropylene fiber tow filter rod, namely the gas chromatography-mass spectrometry method. This standard is applicable to the determination of benzene, toluene, ethylbenzene and xylene in polypropylene fiber tow and polypropylene fiber tow filter rod. 2 Normative references The following referenced documents are indispensable for the application 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. GB/T 15270-2001 Tobacco and tobacco products - Polypropylene fiber tow filter rod YC/T 27-2002 Polypropylene fiber tow for cigarette 3 Principle Extract benzene, toluene, ethylbenzene and xylene in the specimen with n-pentane solution which contains the internal standard, and then determine the contents of benzene, toluene, ethylbenzene and xylene in the extract by the gas chromatography-mass spectrometry method to obtain the residual amount of benzene, toluene, ethylbenzene and xylene in the specimen through calculation. 4 Reagents Unless otherwise specified, reagents of analytically pure grade shall be used. 4.1 Reagents 4.1.1 n-hexane (C6H14) of SuperPure grade or pesticide residue grade. 4.1.2 n-pentane (C5H12) of chromatographic grade. 4.1.3 Benzene (C6H6), with purity of ≥99%. 4.1.4 Toluene (C7H8) with purity of ≥99%. 4.1.5 Ethylbenzene (C8H10), with purity of ≥99%. 4.1.6 o-xylene (o-C8H10), with purity of ≥99%. 4.1.7 m-xylene (m-C8H10), with purity of ≥99%. 4.1.8 p-xylene (p-C8H10), with purity of ≥99%. 4.1.9 2-hexanone (internal standard). If other substances are used as internal standards, their applicability shall be verified. 4.2 Preparation of internal standard solutions

Foreword I 1 Scope 2 Normative references 3 Principle 4 Reagents 5 Apparatuses and conditions 6 Analytical procedures 7 Calculation and expression of results 8 Recovery rate, limit of detection, and limit of quantitation 9 Test report Annex A (Informative) Chromatogram examples