A counterbalanced hinge assembly for rotatably supporting a decklid of a vehicle includes a hinge box and a support member rotatably attached to the hinge box. The compound with amino group in a sample containing the compound with amino group is labeled with a specific carbamate compound such as p-trimethylammonium anilyl-N-hydroxysuccinimidyl carbamate iodide to enhance the selectivity and sensitivity. A seismic source on the source array may be triggered when the source array is at a desired location as measured by the positioning system unit. A glue may also be provided to secure the needle guide to the tube. The memory unit is configured to be precharged to a specified precharge voltage level and the precharge voltage is less than a threshold voltage of the first diode and second diode.