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GB/T 22728-2008: Determination of butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) in cosmetics -- High performance liquid chromatography
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GB/T 22728-2008: Determination of butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) in cosmetics -- High performance liquid chromatography

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Determination of butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) in cosmetics. High performance liquid chromatography ICS 71.100.70 Y42 National Standards of People's Republic of China Cosmetics butylhydroxyanisole (BHA) and Determination of dibutyl hydroxy toluene (BHT) of High Performance Liquid Chromatography Posted 2008-12-31 2009-08-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

Appendix A of this standard is an informative annex. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. Chinese Academy of Inspection and Quarantine. The main drafters of this standard. Falls Apart, Hao Nan, Yu Wen Lin, Zhou Xin, birch, Juan, Luga text. Cosmetics butylhydroxyanisole (BHA) and Determination of dibutyl hydroxy toluene (BHT) of High Performance Liquid Chromatography

1 Scope

This standard specifies the method for liquid chromatography cosmetics butyl hydroxy anisole (BHA) and butylated hydroxytoluene (BHT) of. This standard is applicable to solid, pasty and liquid cosmetics butyl hydroxy anisole (BHA) and butylated hydroxytoluene (BHT) of Determination. The standard method detection limit. butylated hydroxy anisole (BHA), butylated hydroxytoluene (BHT) are 0.005%. Principle 2 Extracted with methanol by ultrasonic cosmetics BHA, BHT, centrifuged, the supernatant was filtered, and the filtrate was equipped with a UV detector efficiency Liquid chromatography detection, external standard.

3 Reagents and materials

Unless otherwise indicated, all reagents were of analytical grade and water as secondary deionized or distilled water. 3.1 methanol Pure class distinctions or chromatography. 3.2 Standard BHA, purity of not less than 98% (of which 3-BHA, purity of not less than 90%; 2-BHA, purity of not more than 8%); BHT, purity not less At 99%. 3.3 stock standard solution BHA's standard stock solution. Weigh accurately BHA standard 0.1g, accurate to 1mg, dissolved with methanol was transferred to a 100mL capacity Flask, constant volume of methanol, shaking uniform, that was the BHA concentration of standard stock solution 1000μg/mL of. Standard stock solution of BHT. BHT standard accurately weighed 0.1g, accurate to 1mg, dissolved with methanol was transferred to a 100mL capacity Flask, constant volume of methanol, shaking uniform, that was BHT concentration of standard stock solution 1000μg/mL of.

4 Instrument

4.1 High performance liquid chromatograph. with UV detector. 4.2 ultrasonic cleaner. 4.3 high-speed centrifuge. not less than 15000r/min. 4.4 syringe filter samples. the organic phase with a membrane, the membrane pore size of 0.45μm. 4.5 conical flask. a grinding gag, 50mL. 4.6 flask. 100mL, 25mL.

5 Determination

5.1 Sample Processing 5.1.1 solid, pasty Cosmetics. Cosmetics weighed 0.5g (accurate to 1mg) in 50mL conical flask, methanol was added 25.00mL, super Sound extraction 20min, to 12000r/min high-speed centrifugal 15min, supernatant was 0.45μm filter, filtrate for testing. ...