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Citation: WANG Aixia, YE Ping, HUANG Nan, CHEN Yan, LI Xinggen. Determination of residual toluene diisocyanate in sponge bra by gas chromatography[J]. Chinese Journal of Chromatography, ;2017, 35(6): 665-668. doi: 10.3724/SP.J.1123.2017.01029 shu

Determination of residual toluene diisocyanate in sponge bra by gas chromatography

Product Quality Supervising and Inspecting Center of Taizhou City, China National Supervision & Testing Center of Fine Chemicals, Taizhou 225300, China

Received Date: 22 January 2017

Fund Project: Risk Monitoring Item of Jiangsu Bureau of Quality and Technical Supervision (No. 322015120013).

A gas chromatography (GC) with internal standard method was developed for the determination of residual toluene diisocyanate (TDI) in sponge bra. The samples were extracted with ethyl acetate dehydrated, and cleaned up with 0.22 μm microfiltration membrane. The residual toluene diisocyanate was separated on a DB-624 capillary column using temperature programming. The flame ionization detector (FID) was used at 250 ℃. The inlet temperature was 180 ℃ with nitrogen as carrier gas. The linear range was 10-200 mg/L (R²=0.9989) for TDI. The average recovery ranged from 80.5% to 91.6% with RSD not more than 7.9%(n=6). The limit of detection (LOD) and limit of quantification (LOQ) were 10 mg/kg and 100 mg/kg, respectively. The developed method was then utilized to analyse the 100 batches of sponge bra samples from the manufacturing enterprises, the entity shops and electric business platforms. The method is simple, time-saving and environment friendly with high sensitivity and good reproducibility, and has practical application value due to its low-cost and short-circle.
- gas chromatography (GC),
- internal standard method,
- toluene diisocyanate (TDI),
- sponge bra
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