Gas chromatography-mass spectrography combined detection method for eight monohydric polyaromatic hydrocarbon in urine
A polycyclic aromatic hydrocarbon and detection method technology, applied in the field of physical and chemical inspection of biomarkers, can solve the problems of low sensitivity, cumbersome pretreatment, and high detection cost
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Embodiment 1
[0016] A gas chromatography-mass spectrometry detection method for monohydroxy polycyclic aromatic hydrocarbons in urine, comprising the following steps:
[0017] 1. Chemical reagents
[0018] 1-hydroxyphenanthrene, 2-hydroxyphenanthrene, 3-hydroxyphenanthrene, 4-hydroxyphenanthrene, 9-hydroxyphenanthrene, 1-hydroxypyrene, 3-hydroxybenzo[a]pyrene, 7-hydroxybenzo[a]pyrene, 2-hydroxyphenanthrene-d9, 1-hydroxypyrene-d9, 3-hydroxybenzo[a]pyrene-d11, 25% N,O-bistrimethylsilylacetamide solution in acetonitrile.
[0019] 2. Standard curve establishment
[0020] 8 kinds of standard solutions of 1-hydroxy polycyclic aromatic hydrocarbons: using acetonitrile as solvent, prepare 1-hydroxyphenanthrene, 2-hydroxyphenanthrene, 3-hydroxyphenanthrene, 4-hydroxyphenanthrene, 9-hydroxyphenanthrene, 1-hydroxyphenanthrene at a concentration of 1 μg / mL respectively Hydroxypyrene, 3-hydroxybenzo[a]pyrene, and 7-hydroxybenzo[a]pyrene are single standard solutions of 8 kinds of monohydroxy polycycl...
Embodiment 2
[0035] Actual sample testing:
[0036] Shake the urine sample after thawing at room temperature, accurately pipette 5 mL into a 25 mL test tube, and add 10 μL of 100 ng / mL 2-hydroxyphenanthrene-d9, 1-hydroxypyrene-d9 and 3 -Hydroxybenzo[a]pyrene-d11 three deuterated compound solution (converted to 1000pg / deuterated compound), then add 2 mL of sodium acetate buffer (pH5.5, 1M) and 10 μL of β-glucose Glycocuronidase / arylsulfatase proenzyme (364.25U / mL urine), mixed thoroughly, placed in a microwave-assisted extraction apparatus, and hydrolyzed at a constant temperature of 37 °C for 60 s. Extract the enzymatically hydrolyzed urine sample with 2*5 mL of n-hexane, combine the organic phases, add 10 μL of n-dodecane with a higher boiling point, filter after anhydrous drying, and concentrate to nearly dryness in a nitrogen atmosphere. The liquid is about 10 μL, add 30 μL toluene and shake for 1 minute, transfer it to a gas chromatography vial with a micro syringe, add 20 μL of 25% N...
Embodiment 3
[0038] Actual sample testing:
[0039] Shake the urine sample after thawing at room temperature, accurately pipette 5 mL into a 25 mL test tube, and add 10 μL of 100 ng / mL 2-hydroxyphenanthrene-d9, 1-hydroxypyrene-d9 and 3 -Hydroxybenzo[a]pyrene-d11 three deuterated compound solution (converted to 1000pg / deuterated compound), then add 2 mL of sodium acetate buffer (pH5.5, 1M) and 10 μL of β-glucose Glycocuronidase / arylsulfatase proenzyme (364.25U / mL urine), mixed thoroughly, placed in a microwave-assisted extraction apparatus, and hydrolyzed at a constant temperature of 37 °C for 60 s. Extract the enzymatically hydrolyzed urine sample with 2*5 mL of n-hexane, combine the organic phases, add 10 μL of n-undecane with a higher boiling point, filter after anhydrous drying, and concentrate to near dryness in a helium atmosphere. The remaining liquid is about 10 μL, add 30 μL toluene and shake for 1 minute, transfer it to a gas chromatography vial with a micro syringe, add 30 μL tr...
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