| CPC G01N 33/6848 (2013.01) [C07K 1/13 (2013.01); G01N 1/28 (2013.01); G01N 2458/15 (2013.01); G01N 2560/00 (2013.01)] | 17 Claims |

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1. A method for quantifying one or more analytes within a sample, the method comprising:
a. providing the sample, wherein the one or more analytes are immobilised to a mass cytometry sample carrier, wherein the sample has been labelled with one or more mass-tagged specific binding pairs comprising one or more labelling atoms, wherein the mass cytometer sample carrier is planar and comprises a polydopamine layer, and
b. performing mass cytometry on the sample to determine a level of the one or more labelling atoms, wherein the level of the one or more labelling atoms corresponds to the copy number of the one or more analytes to quantify the analytes.
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