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Inductively coupled plasma atomic emission spectroscopy (ICP-AES)

EE Elise Eymard-Vernain
SL Sylvie Luche
TR Thierry Rabilloud
CL Cécile Lelong
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Shimadzu ICP 9000 (with Mini plasma Torch in axial reading mode) was used to measure the zinc content. Standard solution for AAS (Sigma Aldrich) was used to generate the calibration curve between 10 to 500 µg/L in pure water with 1% of HNO3 (Fluka). Samples were routinely incubated in HNO3 10% ON at RT. Briefly, 500 µl of each cytosolic crude extract was incubated with 90 µl of HNO3 65% ON at RT. The sample was centrifuged at 13,000 rpm for 5 min. Before to be measured pure water was added to the supernatant extemporaneously to obtain a final volume of 7 ml. Ytterbium solution standard for AAS (Sigma Aldrich) was used as an internal standard to prevent calibration drift and fluidic perturbation. The result was express in µg/L [Zn] per mg of protein.

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