土坛树树皮

我是做环境检测的，最近有做有机农产品认证的客户问我们能不能测树皮中重金属含量？请问有没有熟悉这方面的朋友说一下，什么分析标准可以测树皮。谢谢了

我用 硝酸—高氯酸 消解树皮、树根等，温度180度，溶液澄清后仍有白色絮状物悬浮存在，不知道是什么东西啊？难道是我的消煮还不完全？那位高手指教一下？谢谢了！

Myricetin Increases Hepatic Peroxisome Proliferator-Activated Receptor α Protein Expression and Decreases Plasma Lipids and Adiposity in RatsMyricetin is a flavonol, belong to the flavonoid in Flavonoids (polyphenols), found in many grapes, berries, fruits, vegetables, herbs, as well as other plants. It has been used as antioxidant to lower cholesterol, treat certain types of cancer, etc.Health benefits1. Anti cancersIn the investigation of dietary polyphenols as anticarcinogenic agents and the apoptotic effects of piceatannol and myricetin,found that apoptosis induced by piceatannol or myricetin occurs through an ROS-independent cell death pathway. In conclusion, piceatannol and myricetin synergistically induced apoptosis in HL-60 cells but not in HepG2 cells. These findings suggest that the potential anticarcinogenic properties of dietary polyphenols depend largely on the cell line used, according to “Selective apoptotic effects of piceatannol and myricetin in human cancer cells” by Morales P, Haza AI.(1)2. Skin CancerIn the affirmation of myricetin, a flavonol, found in many plants, including tea, berries, fruits, vegetables, and medicinal herbs and its chemopreventive effects on skin cancer found that myricetin was found to inhibit UVB-induced angiogenesis by targeting PI3-K in an SKH-1 hairless mouse skin tumorigenesis model. Raf kinase is a critical target for myricetin in inhibiting the UVB-induced formation of wrinkles and suppression of type I procollagen and collagen levels in mouse skin, according to “Myricetin is a potent chemopreventive phytochemical in skin carcinogenesis” by Kang NJ, Jung SK, Lee KW, Lee HJ.(2)3. Colon cancerIn the research of Myricetin, a well known bioflavonoid and its protective effect on colon cancer found that Myricetin not only brought about significant decrease in the incidence of number of tumor bearing rats but also the tumor incidence. Myricetin supplementation significantly reduced liver TBARS. Further the anti oxidant enzymes like Catalase, Glutathione peroxidase and GSH were significantly rejuvenated following myricetin supplementation in a dose dependent manner, according to “Effect of myricetin on 1,2 dimethylhydrazine induced rat colon carcinogenesis” by Nirmala P, Ramanathan M.(3)4. Pancreatic cancerIn the observation of the flavonoid myricetin and its effect on metastatic pancreatic cancer cell lines, found that myricetin resulted in tumor regression and decreased metastatic spread. Importantly, myricetin was non-toxic, both in vitro an