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- E-ISSN 2288-8985
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The study on the measurement of formaldehyde in saliva and urine by GC-MS
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2006, v.19 no.2, pp.149-154
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(2006). The study on the measurement of formaldehyde in saliva and urine by GC-MS. Analytical Science and Technology, 19(2), 149-154.
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Abstract
A gas chromatography-mass spectrometric method was developed for the determination of formaldehyde in urine and saliva. In a 20 mL glass tube, 0.2 mL of urine or saliva was taken. Further, 1.8 mL of 0.1 M HCl, 0.1 mL of 2,000 mg/L 2,4-dinitrophenyl hydrazine and <TEX>$20{\mu}l$</TEX> of 500 mg/L acetone-<TEX>$d_6$</TEX> as internal standard were added in the tube and sealed tightly with cap. The solution was shaken for 20 min at room temperature and extracted using 4 mL of toluene. The extract was concentrated and redissolved with <TEX>$100{\mu}l$</TEX> of acetonitrile, and then measured by gas chromatography-mass spectrometer (selected ion monitoring). The detection limit was 2.0 ng/mL and 0.5 ng/mL in saliva and urine, respectively. The calibration curves showed good linearity with r
- keywords
- Gas chromatography-mass spectrometric method, formaldehyde, saliva, urine
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