>“Chromatography separates all the substances,” Lladanosa says as she loads the machine with an array of drugs sent from the deep web and local Spanish users. It can tell whether a sample is pure or contaminated, and if the latter, with what.</p>
            <p name="5d0f" id="5d0f">Rushes of hot air blow across the desk as the gas chromatograph blasts the sample at 280 degrees Celsius. Thirty minutes later the machine’s robotic arm automatically moves over to grip another bottle. The machine will con