การหาปริมาณสารหนูและโลหะหนักในสัตว์น้ำและสาหร่ายในทะเลสาบสงขลาในเดือน ธันวาคม 2538

Abstract

      The aim of this research was to analyze the amount of arsenic and heavy metals in aquatic animals and seaweed in Songkhla Lake. Twenty-four samples of fish, prawn, mussel, crab and seaweed were collected from Songkhla Lake in December 1995. The samples were analyzed for the quantity of arsenic and heavy metals by means of atomic absorption spechophotometry : direct aspiration technique for determination of lead, zinc and cadmiums, cold vapour technique for determination of mercury; and hydride generation technique for determination of arsenic.
       The findings revealed that there were a$enic, lead, mercury, zinc and cadmium in giant seaperch ranging berween 0-0.250, 0.183-1.985, 0-0.102' 0.094-1.88r and o-0.010 ppm (pgrg) respectively. There were arsenic, lead, mercury, zinc and cadmium in gaint tiger prawn ranging between 0 - O.1bo, O - 2.625, 0-0.01b, 0,129-4.8ls and 0-0.380 ppm respectively There were arsenic, lead, mercury, zinc and cadmium in green mussel ranging between 0 - 1.2 50,1.84 8- l.98b,0, 0 021,2 634-4.573 and 0.041-0.343 ppm respectively. There were arsenic, lead, mercury, zinc and cadmium in senated mud crab ranging between 0.150-2.265,1.280-2.008,0-0.038,0.311-0.? 1g and 0.018-0.348 ppm respectively. There were arsenic, lead, mercury, zinc and cadmium in seaweed, Gncilaria fishei runging between 0-1,250, 1.260-3.313, 0-0.069, 0.0726.80? and 0-0.06b ppm respecrively.