1.Studies on Ecoenvironment and Chemico-Physical Characteristic of Soil for the Growth of Dwarf Lilyturf(Ophiopogon japonicus)
Derong DING ; Xingfu CHEN ; Wenxiu HUANG
Chinese Traditional and Herbal Drugs 1994;0(01):-
Ideal ecological condition for the growth of Ophiopogon japonicus(L. f) Ker-Gawl. is a warm and moist environment. It is generally planted along the banks of Fujing River,460~520m above sea level. The best soil will be brown and sandy with complicated parent material,rich in mineral,calcium and organic matters,neutral and vivid with bacterial activity. It has a deep soil horizon,shallow water level,loosely composed on the surface while tightly beneath,good permeation for both air and water. Such a concert among soil,water,air,heat and manure will result in a high yield of the plant to satisfy the demand of high quality product.
2.Determination of Free Inorganic Cadmium Ions in Marine Bivalves by High Performance Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry
Yanfang ZHAO ; Jinsong NING ; Derong SHANG ; Yuxiu ZHAI ; Haiyan DING ; Xiaofeng SHENG
Chinese Journal of Analytical Chemistry 2016;(8):1277-1280
Abstract A new method was established to determine the free inorganic cadmium ion ( Cd2+) in marine bivalves using high performance liquid chromatography and inductively coupled plasma mass spectrometry ( HPLC-ICP-MS) . The free Cd2+ in shellfish was ultrasonic extracted for 40 min by 10 mmol/L Tris buffer solution ( with 0. 1 mol/L NaCl, pH=7. 5), and the separation of Cd2+ was achieved using an IonPac CS5A analytical column with an IonPac CG5A guard column. The mobile phase consisted of 50 mmol/L C2 H2 O4 and 95 mmol/L LiOH. The new method had a good linear relationship with the correlation coefficient of 0. 999 and the standard recoveries of Cd2+ were all above 84. 6%. The free Cd2+ content in several kinds of marine bivalves was determined using the method and the results showed that the percentage of free inorganic Cd2+ to the total Cd content in samples with high Cd content was higher than those with low Cd content.