2results about How to "Good digestion effect" patented technology

The invention belongs to the technical field of analysis and testing of impurities in high-purity samples, and particularly relates to an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) detection method for trace impurities in high-purity yellow phosphorus. Through accurate weighing of a yellow phosphorus sample and a mixed acid-microwave digestion technology, the sample is rapidly dissolved under high-temperature and high-pressure conditions, and the sample is diluted and then directly detected on a machine; the yellow phosphorus sample pretreatment and on-machine measurement efficiency is improved. The method mainly comprises the following steps: S1, weighing a yellow phosphorus sample; s2, sample digestion; and S3, ICP-MS machine detection is carried out. According to the method, a yellow phosphorus sample is digested by adopting a mixed acid-microwave digestion method and then is detected by adopting an ICP-MS (Inductively Coupled Plasma Mass Spectrometry), and a proper amount of oxalic acid is added into the digested nitric acid, so that elements such as impurities As, Mg, Na, Ca and Fe in the yellow phosphorus sample can be effectively dissolved and released within a short time; in the detection process, a collision reaction tank mode is adopted to eliminate element interference, 23 trace impurity elements can be detected at the same time, the detection efficiency is high, the detection time of each batch of samples is shortened to be within 4 h, and the detection limit of each element is reduced to 10 ppt or below.

The utility model discloses a grain heavy metal detection heating digestion device relates to heavy metal digestion technical field, including heavy metal digestion subassembly, set up on the bottom plate, be used for the digestion of grain heavy metal, and heavy metal digestion subassembly includes the rack of installation on the bottom plate, is installed with digestion bin on the rack, is installed with heating inner bag in digestion bin, is provided with stirring mechanism on digestion bin, is installed with temperature controller on the rack, release subassembly sets up at the bottom of digestion bin, is used for the classified release of grain and digestion waste liquid, and the detachable installation of release pipe has main seal cover, and the filter screen is installed in main seal cover, and the detachable installation of auxiliary seal cover is installed in main seal cover, and the seal cover dismounting mechanism is provided on release pipe and main seal cover, and the auxiliary seal cover dismounting mechanism is provided on main seal cover and auxiliary seal cover, the utility model discloses, make grain be even heated digestion heavy metal, and the digestion effect of heavy metal is better, and it is convenient to classify collection of grain and digestion waste liquid.