GB/T 28606-2012Determination of perfluorooctanoic acid and salt in the coating -High performance liquid chromatography-tandem mass spectrometry (English PDF)

4.1 acetonitrile

HPLC grade.

4.2 ammonium acetate (10mmol/L)

Weigh the appropriate amount of ammonium acetate to a beaker, dissolved in water and transferred to a 1L volumetric flask.

4.3 perfluorooctanoic acid (PFOA) standard substance

mass fraction purity of not less than 96%.

4.4 SPE

Oasis(R) HLB or equivalent person; prior to use successively with 3mL methanol, 3mL water activation.

Note. [Oasis(R) HLB] is provided by the American Waters company, give this information is for the convenience of users of this standard does not mean that the production

Approved products, if other equivalent products having the same effect, you can use these equivalent products.

4.5 microporous membrane

0.2µm, organic phase.

4.6 standard stock solution

Weigh accurately perfluorooctanoic acid (PFOA) Standards 0.1g, accurate to 0.1mg, the transfer to dissolved with acetonitrile

100mL flask, acetonitrile volume, shaking uniform, that was perfluorooctanoic acid (PFOA) standard stock solution at a concentration of 1000µg/mL of.

4.7 standard solution

accurate Pipette stock standard solution 1.00mL, to 100mL volumetric flask, acetonitrile volume, shaking uniform, that was perfluorooctanoate

Acid (PFOA) at a concentration of 10µg/mL of the standard solution.

5.1

high performance liquid chromatography - tandem mass spectrometry with electrospray ionization (ESI).

5.2 Analysis of balance

a sense of the amount of 0.01g, 0.1g.

5.3

ultrasonic cleaning.