130results about "Testing water hardness" patented technology

The invention discloses a water quality analyzer. The water quality analyzer comprises a first disc system, a second disc system, a colorimetry system, a cleaning system, a mechanical sampling system, an analysis system and a center control display screen. The first disc system and the second disc system can rotate axially, several sample installation sites and agent installation sites are arranged on the circumference of the first disc system, several colorimetry ware installation sites are arranged on the second disc system, the colorimetry system is arranged at the circumference edge of the second disc system, the cleaning system and the mechanical sampling system are arranged between the first disc system and the second disc system, and the analysis system is connected with the colorimetry system and used for transmitting water quality parameters onto the center control display screen. The invention further discloses a water quality analysis method. The water quality analysis method includes the steps of water sample drawing, water sample injection, cleaning, agent taking, agent injection, cleaning, colorimetric analysis and the like. The water quality analyzer and the water quality analysis method have the advantages of high water quality analysis speed and large analysis parameter quantity and are suitable for application and popularization.

A sensor including a substrate and a sensing element disposed on a substrate is provided. The sensing element includes a sensing matrix in contact with a flow of water, an indicator for one or more chemical species in the flow of water, and a selectivity component that reacts reversibly with the one or more chemical species. The sensor also includes a light source configured to direct light through the substrate and the sensing element. The sensor further includes a light detector configured to receive transmitted light from the substrate and the sensing matrix and to generate a signal representative of selective wavelengths of the light indicative of the one or more chemical species in the flow of water.

To provide a hardness measurement reagent unaffected by an M alkalinity in hardness measurement. A hardness measurement reagent as a one-solution type reagent includes a dye chosen from Eriochrome Black T (EBT) and Calmagite, triethanolamine, a glycol compound, and a pH buffer, in which the pH buffer includes a combination of amines selected from primary amines and secondary amines and a salt of a weak base.

A sample device and method for analyzing a sample are claimed. The sample device is a flat disc containing channels and wells for directing a sample to reagents located in the disc and for mixing the sample with the reagents. The disc is mounted on an analyzer and the sample is pumped into the disc, divided into a plurality of sub-sample, and at least some of the sub-samples are mixed with a number of reagents. The resultant analytes are analyzed spectrophotometrically for a determination of the concentration of various substances in the sample. The present invention permits multiple tests to be performed quickly and automatically with minimal operator involvement.

A method for measuring the deposit forming propensity of a continuously flowing fluid having a bulk pH of about 1 to about 12 comprising measuring the rate at which deposit forms on a quartz crystal microbalance (1) having a top side comprising a working electrode (16) in contact with the fluid and a bottom side isolated from the fluid, wherein the pH of the fluid proximate to the microbalance is controlled electrochemically at about 1 to about 14 by applying to the working electrode (16) a cathodic current of about -0.001 to about -100 mA / cm<2> or an anodic current of from about 0.001 to about 100 mA / cm<2> and wherein the working electrode (16) is coated with or made of a conductive material on which the rate of hydrogen gas evolution is at least 10 times lower than on a gold cathode in acidic solution.