Прямое высокочувствительное определение элементов в бензине, керосине и растворах минеральных масел методом атомно-эмиссионной спектрометрии с индуктивно-связанной плазмой

Прямой анализ нефтепродуктов, органических растворителей и топлив методом атомно-эмиссионной спектрометрии с индуктивно-связанной плазмой зачастую возможен только в режиме радиального обзора плазмы и требует использования специальных систем ввода пробы, конструкция которых существенно зависит от физических свойств пробы, в частности, ее летучести и вязкости. Наиболее проблемными объектами анализа являются легколетучие фракции нефти и соответствующие нефтепродукты (нафта, бензин), а также тяжелые и вязкие фракции и нефтепродукты (вакуумный газойль, мазут, густые смазочные масла). В данной работе рассмотрена возможность прямого анализа проб на основе бензина, керосина и смазочных масел, растворенных в керосине, методом атомно-эмиссионной спектрометрии с индуктивно-связанной плазмой (ИСП-АЭС). Исследованы возможности применения различных конфигураций систем ввода образцов и режимов обзора плазмы вертикально расположенной горелки для прямого анализа проб на основе керосина и бензина. Продемонстрировано значительное улучшение чувствительности определения ряда элементов в бензине и керосине за счет использования аксиального обзора плазмы при оптимальных конфигурациях систем ввода и режимах горения плазмы.

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