A method for measuring an amount of dissolved oxygen contained in a liquid sample, including the steps of: (1) adding a deoxygenating amino compound to a liquid sample to prepare the liquid sample having a predetermined concentration of the deoxygenating amino compound; (2) after Step (1), heating the liquid sample containing the deoxygenating amino compound at a temperature of 80 C. or more; (3) after Step (2), measuring the concentration of the deoxygenating amino compound contained in the liquid sample; and (4) calculating the amount of the dissolved oxygen contained in the liquid sample in Step (1) from the amount of the reacted deoxygenating amino compound by comparing the concentration of the deoxygenating amino compound measured in Step (3) and the concentration of the deoxygenating amino compound measured in Step (1).

A method for measuring an amount of dissolved oxygen contained in a liquid sample, including the steps of: (1) adding a deoxygenating amino compound to a liquid sample to prepare the liquid sample having a predetermined concentration of the deoxygenating amino compound; (2) after Step (1), heating the liquid sample containing the deoxygenating amino compound at a temperature of 80 C. or more; (3) after Step (2), measuring the concentration of the deoxygenating amino compound contained in the liquid sample; and (4) calculating the amount of the dissolved oxygen contained in the liquid sample in Step (1) from the amount of the reacted deoxygenating amino compound by comparing the concentration of the deoxygenating amino compound measured in Step (3) and the concentration of the deoxygenating amino compound measured in Step (1).

The present invention relates to a process for monitoring the catalytic activity of an ionic liquid and for the regeneration of the ionic liquid in continuous conversion of an olefin in an alkylation. The process includes (a) providing an ionic liquid; (b) reacting a hydrocarbon mixture with the ionic liquid to obtain an ionic liquid phase. In step (d), adding an organic compound to the ionic liquid phase. In step (e), obtaining an absorption peak of a mixture from step (d) and in step (f) repeating until the absorption peak reaches a maximum or a minimum value. In step (g), determining the total amount of the organic compound or the ionic liquid phase added. Next, (h) calculating the catalytic activity of the ionic liquid. Then, (i) adding aluminium halides to the reaction of step (b) such that the activity of step (h) stays above the minimum level.

The present invention relates to a process for monitoring the catalytic activity of an ionic liquid and for the regeneration of the ionic liquid in continuous conversion of an olefin in an alkylation. The process includes (a) providing an ionic liquid; (b) reacting a hydrocarbon mixture with the ionic liquid to obtain an ionic liquid phase. In step (d), adding an organic compound to the ionic liquid phase. In step (e), obtaining an absorption peak of a mixture from step (d) and in step (f) repeating until the absorption peak reaches a maximum or a minimum value. In step (g), determining the total amount of the organic compound or the ionic liquid phase added. Next, (h) calculating the catalytic activity of the ionic liquid. Then, (i) adding aluminium halides to the reaction of step (b) such that the activity of step (h) stays above the minimum level.

The present invention relates to a process for monitoring the catalytic activity of an ionic liquid. In step (a), providing an acidic ionic liquid; (b) providing an organic compound; (c) adding at least a portion of the organic compound to at least a portion of the ionic liquid; (d) recording an infrared spectrum of a mixture from step (c) to obtain at least one absorption peak. In step (e), repeating steps (c) and (d) until at least one absorption peak reaches a maximum value or a minimum value. In step (f), determining at the maximum value or minimum value of step (e): the total amount of the organic compound or the total amount of the ionic liquid added. In step (g), calculating the catalytic activity of the ionic liquid based on: the total amount of the organic compound or the total amount of ionic liquid, as determined in step (f).

The present invention relates to a process for monitoring the catalytic activity of an ionic liquid. In step (a), providing an acidic ionic liquid; (b) providing an organic compound; (c) adding at least a portion of the organic compound to at least a portion of the ionic liquid; (d) recording an infrared spectrum of a mixture from step (c) to obtain at least one absorption peak. In step (e), repeating steps (c) and (d) until at least one absorption peak reaches a maximum value or a minimum value. In step (f), determining at the maximum value or minimum value of step (e): the total amount of the organic compound or the total amount of the ionic liquid added. In step (g), calculating the catalytic activity of the ionic liquid based on: the total amount of the organic compound or the total amount of ionic liquid, as determined in step (f).

The present disclosure relates to compositions, films and devices for sensing gas molecules. More particularly, the present disclosure relates to compositions, films and devices for sensing gas molecules utilizing optical sensing techniques having improved optical properties.

A reagent test paddle includes a contamination detection medium, a reference color bar, at least one chemical test medium, and a unique identifier. The contamination detection medium includes a reagent that changes color in the presence or when exposed to a hostile or inhospitable environment. Each chemical test medium includes a regent that is responsive to a respective analyte in a biological sample. The reference color bar includes reference color samples of different colors. The unique identifier, like a serial number, identifies the particular paddle and its chemical test medium so it can be uniquely and anonymously associated with a user. A method includes capturing and interpreting digital images of a biologically unexposed and subsequently exposed reagent test paddle at various delay times within an automatically calibrated environment; locating the paddle in a plurality of digital images, extracting the reference color bar and locating the contamination detection medium and chemical test medium in each digital image. Color changes of the chemical test medium and contamination medium are detected at various delay times after sample exposure. To determine validity of test results, the method further compares the detected colors of the contamination detection medium with predetermined colors expected for no contamination and contamination.

A reagent test paddle includes a contamination detection medium, a reference color bar, at least one chemical test medium, and a unique identifier. The contamination detection medium includes a reagent that changes color in the presence or when exposed to a hostile or inhospitable environment. Each chemical test medium includes a regent that is responsive to a respective analyte in a biological sample. The reference color bar includes reference color samples of different colors. The unique identifier, like a serial number, identifies the particular paddle and its chemical test medium so it can be uniquely and anonymously associated with a user. A method includes capturing and interpreting digital images of a biologically unexposed and subsequently exposed reagent test paddle at various delay times within an automatically calibrated environment; locating the paddle in a plurality of digital images, extracting the reference color bar and locating the contamination detection medium and chemical test medium in each digital image. Color changes of the chemical test medium and contamination medium are detected at various delay times after sample exposure. To determine validity of test results, the method further compares the detected colors of the contamination detection medium with predetermined colors expected for no contamination and contamination.

A device and method for testing for the presence of liquid in a cannula of a medical instrument is described. The device includes a flexible guide member having a first end, a second end and a length extending from the first end to the second end, an elongated member arranged within the flexible guide member, and an absorbent material attached to one of the elongated member. The flexible guide member is inserted into the cannula, the flexible guide member is manipulated to cause the absorbent material to move through the cannula. The absorbent material is analyzed for the presence of liquid.