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GB/T 32118-2015: Determination of formaldehyde in toothpaste -- High performance liquid chromatography
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GB/T 32118-2015	English	129	Add to Cart	3 days [Need to translate]	Determination of formaldehyde in toothpaste -- High performance liquid chromatography

GB/T 32118-2015: Determination of formaldehyde in toothpaste -- High performance liquid chromatography

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(Toothpaste formaldehyde content by HPLC) ICS 71.100.40 Y43 National Standards of People's Republic of China Toothpaste formaldehyde content by HPLC Issued on. 2015-10-09 2016-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China National Light Industry Council. The standard oral care products by the National Technical Committee of Standardization Technical Committee toothpaste (SAC/TC492/SC1) centralized. This standard was drafted. Shanghai Daily Chemical Co. Maxam. The main drafters of this standard. Chenjian Fen, Shi Lei descent. Toothpaste formaldehyde content by HPLC

1 Scope

This standard specifies the formaldehyde content of toothpaste Determination by HPLC. This standard applies to the determination of toothpaste added formaldehyde, toothpaste does not apply to other products containing formaldehyde release agent.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. Laboratory use specifications and test methods GB/T 6682 Analysis Principle 3 Dissolved toothpaste with water, and separated by centrifugation, the supernatant was 2,4 dinitrophenylhydrazine derivatization, reaction product under heating conditions To formaldehyde derivatives 2,4 Dinitrophenylhydrozones by high performance liquid chromatography with UV detection was measured against a standard curve calculation Formaldehyde content in the sample. Formaldehyde with 2,4-dinitrophenylhydrazine reaction of 2,4-dinitrophenyl hydrazone reaction formula shown in Fig. Figure 1 derivatized formaldehyde reaction formula

4 Reagents and materials

Unless otherwise indicated, all reagents superior grade of pure water as a water GB/T 6682 regulations. 4.1 acetonitrile. chromatography. 4.2 Formaldehyde standard solution (10.0mg/mL). ampoules package, placed above 10 ℃ to save, when used with the temperature balance, shake uniform, playing After opening recommend disposable, or standard solution was transferred to a brown bottle was sealed and stored at above 10 ℃. 4.3 glacial acetic acid. AR. 4.4 Sodium acetate. AR. 4.5 2,4-dinitrophenylhydrazine. Purity ≥99%. 4.6 acetic acid - sodium acetate buffer solution (pH = 5.0). Weigh 2.64g of sodium acetate to dissolve the amount of water, was added 1.0mL of glacial acetic acid, add water ...