The samples of pueraria lobata ohwi were digested by HNO3 + HClO4.contents of the next trace elements Fe,Zn,Cu,Mn,Ca,Mg,Co,Cr,Ni,Cd,Pb and Al in the bloom,base,stem,and leaf of Impatiens balsamina have been determined...The samples of pueraria lobata ohwi were digested by HNO3 + HClO4.contents of the next trace elements Fe,Zn,Cu,Mn,Ca,Mg,Co,Cr,Ni,Cd,Pb and Al in the bloom,base,stem,and leaf of Impatiens balsamina have been determined by Flame Atomic Absorption method.The result show that the recovery is about 97.5%-103.2%,and the RSD<2.7%,with good accuracy and precision.The order of the content of the trace elements of high to low is as follows:leaf>stem>bloom>base.The importance of essential trace elements Zn,Fe,Mn,Cu for human each has a higher content.In addition,toxic trace elements such as lead,arsenic and cadmium are also found.展开更多
Hesperidin and naringoside in xiangsha yangwei pill has been determined by the HPLC,in which the DiamonsilTMC18(4.6 mm×150 mm,5 μm)was used as the column at UV 283 nm and the CH3CN-H2O solution(22∶78) was made ...Hesperidin and naringoside in xiangsha yangwei pill has been determined by the HPLC,in which the DiamonsilTMC18(4.6 mm×150 mm,5 μm)was used as the column at UV 283 nm and the CH3CN-H2O solution(22∶78) was made use of mobile phase,in which H3PO4 was used as agent to regulate pH(3.5),the flow rate is 1.2 mL·min-1,there was a fine separated degree between the pending component and other component and the lineal range of Hesperidin and naringoside is 0.25μg^1.49 μg and 0.023μg^0.14 μg respectively.The average recoveries of Hesperidin and Naringoside were 99.3% and 102.6% respectively with RSD being 1.2% and 2.5%.The result can give a simple,effective method for controlling the quality of xiangsha yangwei pill.展开更多
A new RP-HPLC method for the determination of lead in Rhodiola species was established on a Shim-pack Vp-ODS column（150 mm×4.6 mm I.D.,5μm） at UV 255 nm.The column temperature is 300C.Bis（Salicyladehyde）o-ph...A new RP-HPLC method for the determination of lead in Rhodiola species was established on a Shim-pack Vp-ODS column（150 mm×4.6 mm I.D.,5μm） at UV 255 nm.The column temperature is 300C.Bis（Salicyladehyde）o-phenydnediiminato was used as a on line derivate agent and MeOH-H2O-derivate agent（65:33.5:1.5,v/v） was made use of mobile phase.The method was applied for the determination of lead and the lineal range of lead is 0.1352-0.6759ng（r=0.9989）.The average recovery is 99.2% with RSD being 2.9%（n=5）.展开更多
Reaction of anion(phenoxo)functionalized-NHC predecessor[HO-3,5-di-C(CH3)3-C6H2-2-CH2{CH(NCHCHN)CH(CH3)2}]Cl with N-BuLi in molar ratio 1∶2 at the room temperature gives the first N-heterocyclic carbenes(NHC)benzyl m...Reaction of anion(phenoxo)functionalized-NHC predecessor[HO-3,5-di-C(CH3)3-C6H2-2-CH2{CH(NCHCHN)CH(CH3)2}]Cl with N-BuLi in molar ratio 1∶2 at the room temperature gives the first N-heterocyclic carbenes(NHC)benzyl migration product functionalized by phenoxo.The compound has been characterized by the 1HNMR and X-ray diffraction.The result show the crystal belongs to monoclinic system with a=10.8224(18),b=19.469(3),c=11.6658(18),α=90°,β=97.992(4)°,γ=90(11)°,V=2434.1(7)3,Z=2,Dc=1.109Mg/m3,μ=0.069 mm-1,F(000)=888.The reason for 1,2-benzyl migration is temperature,at the same time the mechanism of the reaction has been discussed in this article.展开更多
Objective:To determine the contents of the four efficacious elements(quercetin;ellagic acid) in Huaijiao Wan by RP-HPLC.Method:High Performance Liquid Chromatograph is employed with a Column of Diamonsil ODS-C18(4.6mm...Objective:To determine the contents of the four efficacious elements(quercetin;ellagic acid) in Huaijiao Wan by RP-HPLC.Method:High Performance Liquid Chromatograph is employed with a Column of Diamonsil ODS-C18(4.6mm×250mm,5.0μm) and a mobile phase of MeOH-H2O-HAc(2∶3∶0.15),the detection wavelength being 270 nm and the column temperature being 300C.Result:Nice linear relation exists when,quercetin is within 0.2048-1.229μg and ellagic acid within 0.5325-3.192 μg.The R value of each group is 0.9991 and 0.9998.The average rate of recovery of the two groups is between 98.0% and 99.1%.The RSD of each group is 1.02% and 0.40%(n=5).Conclusion:With this method,the two efficacious elements could be determined simultaneously.And for its convenience,nicety,high sensitivity and fidelity,it is applicable to the quality examination of Huaijiao products and to manufacturers’ control of quality.展开更多
文摘The samples of pueraria lobata ohwi were digested by HNO3 + HClO4.contents of the next trace elements Fe,Zn,Cu,Mn,Ca,Mg,Co,Cr,Ni,Cd,Pb and Al in the bloom,base,stem,and leaf of Impatiens balsamina have been determined by Flame Atomic Absorption method.The result show that the recovery is about 97.5%-103.2%,and the RSD<2.7%,with good accuracy and precision.The order of the content of the trace elements of high to low is as follows:leaf>stem>bloom>base.The importance of essential trace elements Zn,Fe,Mn,Cu for human each has a higher content.In addition,toxic trace elements such as lead,arsenic and cadmium are also found.
文摘Hesperidin and naringoside in xiangsha yangwei pill has been determined by the HPLC,in which the DiamonsilTMC18(4.6 mm×150 mm,5 μm)was used as the column at UV 283 nm and the CH3CN-H2O solution(22∶78) was made use of mobile phase,in which H3PO4 was used as agent to regulate pH(3.5),the flow rate is 1.2 mL·min-1,there was a fine separated degree between the pending component and other component and the lineal range of Hesperidin and naringoside is 0.25μg^1.49 μg and 0.023μg^0.14 μg respectively.The average recoveries of Hesperidin and Naringoside were 99.3% and 102.6% respectively with RSD being 1.2% and 2.5%.The result can give a simple,effective method for controlling the quality of xiangsha yangwei pill.
文摘A new RP-HPLC method for the determination of lead in Rhodiola species was established on a Shim-pack Vp-ODS column（150 mm×4.6 mm I.D.,5μm） at UV 255 nm.The column temperature is 300C.Bis（Salicyladehyde）o-phenydnediiminato was used as a on line derivate agent and MeOH-H2O-derivate agent（65:33.5:1.5,v/v） was made use of mobile phase.The method was applied for the determination of lead and the lineal range of lead is 0.1352-0.6759ng（r=0.9989）.The average recovery is 99.2% with RSD being 2.9%（n=5）.
文摘Reaction of anion(phenoxo)functionalized-NHC predecessor[HO-3,5-di-C(CH3)3-C6H2-2-CH2{CH(NCHCHN)CH(CH3)2}]Cl with N-BuLi in molar ratio 1∶2 at the room temperature gives the first N-heterocyclic carbenes(NHC)benzyl migration product functionalized by phenoxo.The compound has been characterized by the 1HNMR and X-ray diffraction.The result show the crystal belongs to monoclinic system with a=10.8224(18),b=19.469(3),c=11.6658(18),α=90°,β=97.992(4)°,γ=90(11)°,V=2434.1(7)3,Z=2,Dc=1.109Mg/m3,μ=0.069 mm-1,F(000)=888.The reason for 1,2-benzyl migration is temperature,at the same time the mechanism of the reaction has been discussed in this article.
文摘Objective:To determine the contents of the four efficacious elements(quercetin;ellagic acid) in Huaijiao Wan by RP-HPLC.Method:High Performance Liquid Chromatograph is employed with a Column of Diamonsil ODS-C18(4.6mm×250mm,5.0μm) and a mobile phase of MeOH-H2O-HAc(2∶3∶0.15),the detection wavelength being 270 nm and the column temperature being 300C.Result:Nice linear relation exists when,quercetin is within 0.2048-1.229μg and ellagic acid within 0.5325-3.192 μg.The R value of each group is 0.9991 and 0.9998.The average rate of recovery of the two groups is between 98.0% and 99.1%.The RSD of each group is 1.02% and 0.40%(n=5).Conclusion:With this method,the two efficacious elements could be determined simultaneously.And for its convenience,nicety,high sensitivity and fidelity,it is applicable to the quality examination of Huaijiao products and to manufacturers’ control of quality.
