Abstract: Aspects of the present disclosure relate to methods of complexing agent content determination. In at least one aspect, a method includes diluting a first solution with water to form a second solution. The first solution includes a nickel source and a complexing agent. The method includes introducing an indicator with the second solution. The method includes titrating the second solution with a base to provide a color change of the second solution. The method includes calculating a content of the complexing agent of the first solution.

Abstract: A trash receptacle for a table top comprising a trash receptacle holding portion and a trash receptacle attachment portion for attaching the trash receptacle to a table top.

Abstract: A blow-up swimming pool that has an inflatable wall structure, a fan conductively coupled to the wall structure, a one-way air valve, and a blower control system for controlling the fan and the one-way air valve. The one-way air valve is disposed between the blower control system and the inflatable wall structure.

Abstract: A doll for simulating asthma or other symptoms and responding to simulated treatment from an associated toy breathing machine includes a body and head including operating elements such as a programmer, transceiver, internal controller, speaker, microphone, skin element, and proximity sensor. The associated toy breathing machine generally includes a housing, tube, and mask, along with a proximity element. The doll is programmed by a user to simulate symptoms of an asthma attack and to recognize the proximity of the mask on the doll's face and to simulate the alleviation of symptoms. The doll may also simulate other illness symptoms, such as feverish temperature and red skin. The doll may include multiple proximity sensors and may recognize the proximity of toys including a toy inhaler, toy medicine dropper, toy blood oxygen monitor, and toy thermometer adjacent the respective proximity sensors.

Abstract: An adapter for placing a mug into a traditional cup holder has a top section, a generally vertical slot in the top section configured to receive a handle of the mug, and a bottom section configured for inserting the adapter into the cup holder.