litosphereЛитосфераLITHOSPHERE (Russia)1681-90042500-302XA.N. Zavaritsky Institute of Geology and Geochemistrylitosphere-825Research ArticleСтатьиArticlesО процессах лазерного испарения и использовании водных стандартов при ЛА-ИСП-МС-анализе ряда минераловВотяковСергей Леонидовичvotyakov@igg.uran.ruАдамовичНаталья Николаевнаnoemail@neicon.ruИнститут геологии и геохимии УрО РАНRussian Federation201115022019045669Copyright © Вотяков С.Л., Адамович Н.Н., 20192019Вотяков С.Л., Адамович Н.Н.Вотяков С.Л., Адамович Н.Н.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.lithosphere.ru/jour/article/view/825

Получены систематические экспериментальные данные по влиянию параметров лазерного излучения с длиной волны 266 нм (приставка LSX-500, YAG:Nd-лазер) на испарение и образование кратеров в силикатах (цирконе, кварце и др.), фосфатах (монаците, апатите и др.), сульфидах (галените, пирите и др.), а также в кварцевых стеклах. С использованием электронной сканирующей микроскопии (микроскоп JEOL-JSM6390LV) сформирована электронная база данных и атлас кратеров испарения проб; выполнен анализ стереоизображений кратеров, изучена их форма и размеры; проведен расчет массы испаренного вещества. Показано, что процесс лазерного испарения в зерне минерала носит достаточно индивидуальный характер, что требует его детального изучения для оптимизации условий испарения пробы и улучшения аналитических характеристик при исследовании его микропримесного состава ЛА-ИСП-МС-методом. Выполнены эксперименты по опробованию твердых силикатных и карбонатных матриц NIST-612 (National Institute of Standards and Technology), Basalt Glass TB 1G и MACS 3 (United States Geological Survey) в качестве СО микрогомогенного состава для ЛА-ИСП-МС-методики локального определения микроэлементов в минералах (масс-спектрометр ELAN 9000). Предложена схема и испытана приставка для совмещения двух потоков аргона на горелке масс-спектрометра - от лазерной приставки и от распылителя градуировочного водного раствора, в качестве которого использовался мультиэлементный раствор фирмы Perkin-Elmer Instruments; установлено, что имеет место эффект значительного элементного фракционирования, приводящего к отклонению полученных результатов от истинного значения; обоснованы подходы и усовершенствованы методики обсчета аналитических данных на основе использования поправочных коэффициентов, при этом погрешность не превышает границ погрешности метода.

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The authors declare that there are no conflicts of interest present.