The invention belongs to the technical field of trace detection, and discloses a heavy metal trace detection method and application thereof. The detection method; comprising the following steps: preparing a quality sample; mixing the quality sample with the sample to be tested according to a specific proportion; using X-ray fluorescence spectrometer to detect trace heavy metals; and using standard curve to realize quantitative analysis of heavy metals. For the purpose of detecting heavy metal elements in tea, the application of this invention can shorten the detection time, avoid the use of a large amount of acid liquor, improve the environmental protection performance, and lower the detection cost, moreover, the obtained standard curve by this invention has high correlation and accurate detection results.

Embodiments of the present disclosure provide an interrogation device that is operable to apply one or more source signals to one or more coils surrounding a volume, where a material is disposed within the volume. Each of the one or more source signals may excite one of the one or more coils, and the behavior of each the one or more coils responsive to the exciting may be monitored. One or more parameters may be determined based on the behavior of each the one or more coils, and the one or more parameters may be utilized to generate a signature for the material within the volume. The signature may be compared to one or more signatures of known materials to identify the material within the volume.

Embodiments of the present disclosure provide an interrogation device that is operable to apply one or more source signals to one or more coils surrounding a volume, where a material is disposed within the volume. Each of the one or more source signals may excite one of the one or more coils, and the behavior of each the one or more coils responsive to the exciting may be monitored. One or more parameters may be determined based on the behavior of each the one or more coils, and the one or more parameters may be utilized to generate a signature for the material within the volume. The signature may be compared to one or more signatures of known materials to identify the material within the volume.

The present invention relates to a method for product identification comprising subjecting a sample to cyclic voltammetry, wherein the sample is subjected to a plurality of voltammetric cycles to obtain a data set for each cycle and wherein the data sets comprise data points; and comparing the data set for each cycle with a data set for a corresponding cycle of at least one known product to determine whether the sample is the known product. The present invention further relates to a method for determining a profile for a known product, which may be used in determining the identity of a sample.

The present invention provides a connector (18) for use in a beverage dispense system (1), the connector (18) defining a conduit for connecting a beverage line (2) to a beverage supply (4). The connector (18) comprises an electrical sensor (21) (e.g. a capacitive sensor) for measuring an electrical parameter of a beverage within the connector conduit. The electrical parameter and/or changes in the electrical parameter can be used to detect bubbles in the beverage and/or identify the type/brand of beverage.

The present invention provides a connector (18) for use in a beverage dispense system (1), the connector (18) defining a conduit for connecting a beverage line (2) to a beverage supply (4). The connector (18) comprises an electrical sensor (21) (e.g. a capacitive sensor) for measuring an electrical parameter of a beverage within the connector conduit. The electrical parameter and/or changes in the electrical parameter can be used to detect bubbles in the beverage and/or identify the type/brand of beverage.

Methods and systems for detecting and indicating the presence of undesirable substances in ingestible substance such as food or beverages. More specifically, systems and methods for nonvisually and concealably indicating and detecting the presence of unwanted or undesired drugs in beverages and/or food.

Methods and systems for detecting and indicating the presence of undesirable substances in ingestible substance such as food or beverages. More specifically, systems and methods for nonvisually and concealably indicating and detecting the presence of unwanted or undesired drugs in beverages and/or food.

The invention disclosed herein relates to a dry sensor for measuring the concentration of an analyte in a liquid beverage sample. Described herein is a novel dry sensor which is able to receive a liquid sample and adjust the pH of the liquid to be suitable for assaying an analyte of interest without the need to add reagents to the sample and/or to perform manually timed operations and able to detect a redox reaction in the presence of a liquid sample. The meter disclosed herein, when connected to the sensor disclosed herein is able to adjust the temperature of the liquid to be suitable for the assay, apply a series of potentials, measure the current at several times, measure the diffusion coefficient of the limiting electrochemical species, calculate the concentration of one or more analytes, and rapidly provide the user with the required information on the liquid sample.

The invention disclosed herein relates to a dry sensor for measuring the concentration of an analyte in a liquid beverage sample. Described herein is a novel dry sensor which is able to receive a liquid sample and adjust the pH of the liquid to be suitable for assaying an analyte of interest without the need to add reagents to the sample and/or to perform manually timed operations and able to detect a redox reaction in the presence of a liquid sample. The meter disclosed herein, when connected to the sensor disclosed herein is able to adjust the temperature of the liquid to be suitable for the assay, apply a series of potentials, measure the current at several times, measure the diffusion coefficient of the limiting electrochemical species, calculate the concentration of one or more analytes, and rapidly provide the user with the required information on the liquid sample.