US 12,169,164 B2
Diffusive gradients in thin films (DGT) test device for lake water and test method using same
Shuhang Wang, Beijing (CN); Zhihao Wu, Beijing (CN); Xia Jiang, Beijing (CN); Bo Zhang, Beijing (CN); Kun Wang, Beijing (CN); Wenwen Wang, Beijing (CN); Junyi Chen, Beijing (CN); Li Zhao, Beijing (CN); Qing Cai, Beijing (CN); and Cheng Yao, Beijing (CN)
Assigned to CHINESE RESEARCH ACADEMY OF ENVIRONMENTAL SCIENCES, Beijing (CN)
Filed by CHINESE RESEARCH ACADEMY OF ENVIRONMENTAL SCIENCES, Beijing (CN)
Filed on Jan. 6, 2021, as Appl. No. 17/142,495.
Claims priority of application No. 202010012861.7 (CN), filed on Jan. 7, 2020.
Prior Publication US 2021/0208033 A1, Jul. 8, 2021
Int. Cl. G01N 1/14 (2006.01); G01N 33/18 (2006.01)
CPC G01N 1/14 (2013.01) [G01N 33/1826 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A diffusive gradients in thin films (DGT) test device for lake water, comprising:
a floating ball; and
a plurality of water sampling units arranged below the floating ball in sequence along a vertical direction, wherein, every two adjacent water sampling units are connected to each other via a rope, and the topmost water sampling unit is connected to the floating ball also via a rope;
a DGT detection device, a water quality detection device with a multi-parameter probe, and a water sampling device are disposed in each of the water sampling units; and
each water sampling device comprises:
a plurality of sampling bottles, wherein, each of the sampling bottles is provided with an inlet pipe and an exhaust pipe; and each of the inlet pipes and exhaust pipes is provided with a one-way solenoid valve;
a peristaltic pump, wherein, a water sample outlet of the peristaltic pump connected to the inlet pipes of the plurality of sampling bottles via a first multi-way connector; and the exhaust pipes of the plurality of sampling bottles are connected to an exhaust manifold via a second multi-way connector; and
a control device connected to the peristaltic pump and the one-way solenoid valve on each of the inlet pipes and exhaust pipes.