Home Cart Quotation About-Us
www.ChineseStandard.net
SEARCH

GB/T 45275-2025 PDF English

US$260.00 · In stock · Download in 9 seconds
GB/T 45275-2025: Determination of N, N-dimethylformamide in toys and children's products - Gas chromatography-mass spectrometry
Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Status: Valid
Standard IDUSDBUY PDFDeliveryStandard Title (Description)Status
GB/T 45275-2025260 Add to Cart Auto, 9 seconds. Determination of N, N-dimethylformamide in toys and children's products - Gas chromatography-mass spectrometry Valid

Similar standards

GB/T 45277   GB/T 44512   GB/T 43276   GB/T 45517   

GB/T 45275-2025: Determination of N, N-dimethylformamide in toys and children's products - Gas chromatography-mass spectrometry


---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT45275-2025
GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 97.200.50 CCS Y 57 Determination of N, N-dimethylformamide in toys and children’s products -- Gas chromatography-mass spectrometry Issued on: FEBRUARY 28, 2025 Implemented on: MARCH 01, 2026 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China.

Table of Contents

Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Principle... 4 5 Reagents and materials... 4 6 Instruments... 5 7 Test methods... 5 8 Result calculation... 8 9 Limit of quantitation... 8 10 Precision... 8 11 Test report... 8 Annex A (normative) Data of the target substance N, N-dimethylformamide determined in this document... 10 Annex B (informative) Chromatogram and mass spectrum of N, N-dimethylformamide ... 11 Annex C (informative) Precision... 12 Bibliography... 13

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020 "Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents". Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing authority shall not be held responsible for identifying any or all such patent rights. This document was proposed by National Infant and Child Products Standardization Working Group (SAC/SWG 18). This document shall be under the jurisdiction of National Technical Committee on Toys of Standardization Administration of China (SAC/TC 253) and National Infant and Child Products Standardization Working Group (SAC/SWG 18). The drafting organizations of this document. Guangzhou Customs Technical Center, Huangpu Customs Technical Center, China Consumer Product Quality and Safety Promotion Association, Shenzhen University of Technology, Zhejiang Qunying Vehicle Industry Co., Ltd., Luohe Rover Stationery Manufacturing Co., Ltd., Hangzhou Nomo Testing Technology Co., Ltd., Guangdong Research Institute of New Biomaterials and High-end Medical Devices, Yike Testing and Certification Co., Ltd., Nanjing Customs Light Industrial Products and Children's Products Testing Center, Aofei Entertainment Co., Ltd., Mingmen (China) Children's Products Co., Ltd., Shenzhen Metrology and Quality Inspection Institute, Shantou Customs Technical Center, Shanghai Customs Mechanical and Electrical Products Testing Technology Center, SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Main drafters of this document. Wu Shanshan, Lin Shaopeng, Guo Zongning, Fang Han, Du Hongzhong, Li Shidong, Huang Lina, Chu Junlong, Yan Jinghui, Lin Xianzhen, Huang Kanghui, Ji Changxin, Hong Jinqing, Lu Xuanben, Chen Zhigeng, Chen Qinxue, Lin Xiaowei, Huang Xuehong, Fu Rao, Zhang Xiaoning. Determination of N, N-dimethylformamide in toys and children’s products -- Gas chromatography-mass spectrometry

1 Scope

This document describes the determination of N, N-dimethylformamide in toys and children's product materials by gas chromatography-mass spectrometry. This document is applicable to the determination of N, N-dimethylformamide content in toys and children's product materials.

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 22048-2022, Determination of certain phthalate esters in toys and children products

3 Terms and definitions

There are no terms or definitions that require definition in this document.

4 Principle

Ethyl acetate is used as the extracting solution. Ultrasonic extraction is used to extract N, N-dimethylformamide from toys and children's products. The extract is filtered and then determined by gas chromatography-mass spectrometry. External standard method is used for quantification.

5 Reagents and materials

5.1 Ethyl acetate (CAS No. 141-78-6). chromatographically pure. 5.2 N, N-Dimethylformamide standard substance (CAS No. 68-12-2). purity ≥99%, or with certified standard certificate, as per Annex A. 5.3 N, N-dimethylformamide standard stock solution. Accurately weigh an appropriate amount of N, N-dimethylformamide standard substance (accurate to 0.1 mg). Use ethyl acetate (5.1) to prepare a standard stock solution with a mass concentration of 100 mg/L. NOTE. The standard stock solution shall be stored at 0℃~8℃ away from light. The validity period is 1 month. 5.4 N, N-dimethylformamide intermediate standard solution. Accurately pipette an appropriate amount of N, N-dimethylformamide standard stock solution (5.3). Use ethyl acetate (5.1) to prepare an intermediate standard solution with a mass concentration of 20 mg/L. NOTE. The intermediate standard solution shall be stored at 0℃~8℃ away from light. The validity period is 1 month. 5.5 N, N-dimethylformamide standard working solution. Take appropriate amount of N, N-dimethylformamide intermediate standard solution (5.4). Dilute with ethyl acetate (5.1) to prepare a series of standard working solutions with mass concentrations of 0.5 mg/L, 1 mg/L, 2 mg/L, 5 mg/L, and 10 mg/L respectively. NOTE. The standard stock solution shall be stored at 0℃~8℃ away from light. The validity period is 1 month.

6 Instruments

6.1 Analytical balance. read to 0.1 mg. 6.2 Stoppered extraction bottle. 50 mL. 6.3 Ultrasonic extractor. with temperature control device; upper temperature limit ≥60℃; the performance of ultrasonic extractor shall be in accordance with 6.13 of GB/T 22048-2022. 6.4 Organic filter membrane. pore size is 0.22 μm. 6.5 Gas chromatography-mass spectrometry (GC-MS). equipped with EI source.

7 Test methods

7.1 Sample preparation and extraction Obtain the single material from the sample by mechanical means. Use suitable tools to shape the sample into a size not exceeding 5 mm. Use an analytical balance (6.1) to weigh 1 g (accurate to 0.1 mg) of sample. Place it in a stoppered extraction bottle (6.2). Add 20.0 mL of ethyl acetate solvent (5.1) and tighten the bottle cap. Place the sample in an ultrasonic extractor (6.3) in a 60°C water bath and ultrasonicate for 30 min. After cooling, filter the extract through an organic filter membrane (6.4). Use a gas chromatograph-mass spectrometer (6.5) to measure the extract). 7.2 Blank test Except for not weighing the specimen, the remaining steps are the same as 7.1 to carry out a blank test. 7.3 Instrument analysis conditions Since the test results depend on the instrument used, it is not possible to give universal parameters for chromatographic analysis. The parameters shall be set to ensure that the component being measured can be separated from other components to a limited extent during the determination. The following operating conditions have been proven to be suitable for the test. a) Capillary column. polar polyethylene glycol stationary phase, 30 m×0.25 mm×0.25 μm; b) Injection volume. 1 μL; c) Injection port temperature. 230℃; d) Chromatographic mass spectrometer interface temperature. 250℃; e) Transfer line temperature. 250℃; f) Column temperature. 50℃ for 2 min; 20℃/min to 200℃, for 2 min; g) Injection system. non-divided flow; h) Carrier gas. helium; i) Carrier gas flow rate. 1.2 mL/min; j) Ionization mode. EI ionization; k) Ionization energy. 70 eV; l) Ion source temperature. 230℃; m) Solvent delay. 2 min; n) Scan mode. full scan mode and selected ion monitoring; mass scanning range is 30 amu~100 amu; quantification ion is 73; qualification ions are 44, 42, 72, 74. 7.4 Drawing of standard working curve ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Image 1     Image 2     Image 3     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of English version of GB/T 45275-2025 be delivered?Answer: The full copy PDF of English version of GB/T 45275-2025 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.

Question 2: Can I share the purchased PDF of GB/T 45275-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 45275-2025_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 45275-2025 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.

How to buy and download a true PDF of English version of GB/T 45275-2025?

A step-by-step guide to download PDF of GB/T 45275-2025_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 45275-2025".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3    Steps 4~6    Step 7    Step 8    Step 9