Device for acid-decomposition of a substance for elementary analysis under controlled pressure in a microwave field

摘要

The invention relates to a device for acid decomposition for elementary analysis which consists of an outer container and an inner container, with a lid guided vertically movably in a decomposition vessel acting on a rod having a pin guided upwards through a central orifice in the cap. In order in particular to allow secure and reliable checking that the internal pressure in the decomposition device has not exceeded an allowed limit value, it is proposed to detect the position of the pin 19 using a measurement-value pick-up which is inert to microwaves and use it in a regulating circuit as the control element for the microwave heating of the microwave oven. The measurement-value pick-up should preferably work mechanically, that is to say using a lever, hydraulically, pneumatically or optically. <IMAGE>