Citation: Qing Tao PENG, Wen Xiang HU, Sheng Jian TAN, Pei Rang CHEN, Xiang Xian ZHANG. Determination of Vitamin D₂ and Vitamin D₃ in the Caltrate Weikang Capsules by HPLC[J]. Chinese Chemical Letters, ;1997, 8(12): 1065-1068. shu

Determination of Vitamin D₂ and Vitamin D₃ in the Caltrate Weikang Capsules by HPLC

The Centre of Research and Development of Medicine and Pharmaceuticals, Commission of Science and Technology and Industry for National Defence, Beijing 100101

Received Date: 2 July 1997

The Caltrate Weikang capsules made by us is a high potency calcium preparation,in which vitamin D can promote the body's calcium absorption and the bones calcification.A sensitive HPLC method for the determination of VD₂ and VD₃ in Caltrate Weikang capsules was established and VD stability was also examined.
1. [1]
  Qi Zhang , Bin Han , Yucheng Jin , Mingrun Li , Enhui Zhang , Jianzhuang Jiang . 2D and 3D phthalocyanine covalent organic frameworks for electrocatalytic carbon dioxide reduction. Chinese Chemical Letters, 2025, 36(9): 110330-. doi: 10.1016/j.cclet.2024.110330
2. [2]
  Jiawei Hu , Kai Xia , Ao Yang , Zhihao Zhang , Wen Xiao , Chao Liu , Qinfang Zhang . Interfacial Engineering of Ultrathin 2D/2D NiPS₃/C₃N₅ Heterojunctions for Boosting Photocatalytic H₂ Evolution. Acta Physico-Chimica Sinica, 2024, 40(5): 2305043-0. doi: 10.3866/PKU.WHXB202305043
3. [3]
  Qi HUANG , Youyi WANG , Zhujian MAO , Zhonghui YE , Weihan CHEN , Jui-yeh RAU , Jian HUANG . Enhanced photocatalytic tetracycline degradation via 2D CdS/Ti₃AlC₂ MAX heterostructure. Chinese Journal of Inorganic Chemistry, 2025, 41(11): 2385-2398. doi: 10.11862/CJIC.20250159
4. [4]
  Yuan Teng , Zichun Zhou , Jinghua Chen , Siying Huang , Hongyan Chen , Daibin Kuang . Dual atom-bridge effect promoting interfacial charge transfer in 2D/2D Cs₃Bi₂Br₉/BiOBr epitaxial heterojunction for efficient photocatalysis. Chinese Chemical Letters, 2025, 36(2): 110430-. doi: 10.1016/j.cclet.2024.110430
5. [5]
  Jiaqi Yang , Xuqiang Hao , Jiejie Jing , Yuqiang Hao , Zhiliang Jin . 3D/2D ReSe₂/ZnCdS S-scheme photocatalyst with efficient interfacial charge separation for optimized hydrogen production. Acta Physico-Chimica Sinica, 2025, 41(10): 100131-0. doi: 10.1016/j.actphy.2025.100131
6. [6]
  Haojie Duan , Hejingying Niu , Lina Gan , Xiaodi Duan , Shuo Shi , Li Li . Reinterpret the heterogeneous reaction of α-Fe₂O₃ and NO₂ with 2D-COS: The role of SDS, UV and SO₂. Chinese Chemical Letters, 2024, 35(6): 109038-. doi: 10.1016/j.cclet.2023.109038
7. [7]
  Fangxiang SUN , Qing ZHANG , Yifan ZHANG , Haoyi SUN , Akim V. Shmal′ko , Sergey A. Anufriev , Igor B. Sivaev , Deshuang TU , Hong YAN . Pd-catalyzed B—H bond activation and annulation of nido-carborane with terminal olefins: Facile construction of 2D-3D fused polycyclic compounds. Chinese Journal of Inorganic Chemistry, 2026, 42(3): 467-478. doi: 10.11862/CJIC.20250347
8. [8]
  Hualin Jiang , Wenxi Ye , Huitao Zhen , Xubiao Luo , Vyacheslav Fominski , Long Ye , Pinghua Chen . Novel 3D-on-2D g-C₃N₄/AgI._x._y heterojunction photocatalyst for simultaneous and stoichiometric production of H₂ and H₂O₂ from water splitting under visible light. Chinese Chemical Letters, 2025, 36(2): 109984-. doi: 10.1016/j.cclet.2024.109984
9. [9]
  Liyong Ding , Zhenhua Pan , Qian Wang . 2D photocatalysts for hydrogen peroxide synthesis. Chinese Chemical Letters, 2024, 35(12): 110125-. doi: 10.1016/j.cclet.2024.110125
10. [10]
  Limin Zhao , Chuanbiao Bie , Bei Cheng . 3D ordered macroporous COF-based S-scheme photocatalyst with enhanced H2 production. Chinese Journal of Structural Chemistry, 2026, 45(3): 100834-100834. doi: 10.1016/j.cjsc.2025.100834
11. [11]
  Jiaojiao Deng , Haocheng Li , Fei Zheng , Qingsong Weng , Yu Bai , Xiaoliang Yu , Qianlin Zhang , Qinghua Liang , Baohua Li . A “breathable” 3D lithium host with MnO₂ nanoflake array for long-lifespan anode-free lithium metal batteries. Chinese Chemical Letters, 2026, 37(3): 110681-. doi: 10.1016/j.cclet.2024.110681
12. [12]
  Cailiang Yue , Nan Sun , Yixing Qiu , Linlin Zhu , Zhiling Du , Fuqiang Liu . A direct Z-scheme 0D α-Fe₂O₃/TiO₂ heterojunction for enhanced photo-Fenton activity with low H₂O₂ consumption. Chinese Chemical Letters, 2024, 35(12): 109698-. doi: 10.1016/j.cclet.2024.109698
13. [13]
  Yuexi Guo , Zhaoyang Li , Jingwei Dai . Charlie and the 3D Printing Chocolate Factory. University Chemistry, 2024, 39(9): 235-242. doi: 10.3866/PKU.DXHX202309067
14. [14]
  Jingwen Wang , Peizhang Zhao , Mengmeng Li , Jun Li , Yunfeng Lin . Remedying infectious bone defects via 3D printing technology. Chinese Chemical Letters, 2025, 36(9): 110686-. doi: 10.1016/j.cclet.2024.110686
15. [15]
  Zehao Zhang , Zheng Wang , Haibo Li . Preparation of 2D V₂O₃@Pourous Carbon Nanosheets Derived from V₂CF_x MXene for Capacitive Desalination. Acta Physico-Chimica Sinica, 2024, 40(8): 2308020-0. doi: 10.3866/PKU.WHXB202308020
16. [16]
  Yue Li , Minghao Fan , Conghui Wang , Yanxun Li , Xiang Yu , Jun Ding , Lei Yan , Lele Qiu , Yongcai Zhang , Longlu Wang . 3D layer-by-layer amorphous MoS_x assembled from [Mo₃S₁₃]^2- clusters for efficient removal of tetracycline: Synergy of adsorption and photo-assisted PMS activation. Chinese Chemical Letters, 2024, 35(9): 109764-. doi: 10.1016/j.cclet.2024.109764
17. [17]
  Ao Sun , Zipeng Li , Shuchun Li , Xiangbao Meng , Zhongtang Li , Zhongjun Li . Stereoselective synthesis of α-3-deoxy-D-manno-oct-2-ulosonic acid (α-Kdo) derivatives using a C3-p-tolylthio-substituted Kdo fluoride donor. Chinese Chemical Letters, 2025, 36(3): 109972-. doi: 10.1016/j.cclet.2024.109972
18. [18]
  Li Li , Xue Ke , Shan Wang , Zhuo Jiang , Yuzheng Guo , Chunguang Kuai . Antioxidative strategies of 2D MXenes in aqueous energy storage system. Chinese Chemical Letters, 2025, 36(5): 110423-. doi: 10.1016/j.cclet.2024.110423
19. [19]
  Jinbo Pang , Shuye Zhang , Mark H Rummeli , Hong Liu , Yufeng Hao , Weijia Zhou , Rafael G Mendes . Flat and fabulous: Squeezing elemental metals into the 2D realm. Chinese Journal of Structural Chemistry, 2026, 45(2): 100794-100794. doi: 10.1016/j.cjsc.2025.100794
20. [20]
  Wanxin Hu , Yan Shi , Junxia Yu , Haiyang Shi , Yingping Huang , Ruiping Li . Engineering 2D/2D FeOOH/BiOCl S-scheme heterojunction toward efficient and stable tetracycline photodegradation. Chinese Journal of Structural Chemistry, 2026, 45(3): 100832-100832. doi: 10.1016/j.cjsc.2025.100832