33 results about "Indigo carmine" patented technology

Iodine is used in about 80 percent of surgeries in the US to remove some level of microbial load on the skin prior to making an incision. Skin sealants are applied over skin preps to seal the skin and hold any remaining bacteria in place. Iodine produces a characteristic orange-brown color on skin. A skin sealant is provided that has a decolorant that reacts with the iodine found in most skin preps, rendering the skin prep colorless. A skin sealant containing ascorbic acid (vitamin C), Indigo Carmine or Indigo will react with the iodine, thus visually indicating where the skin prep and sealant have been applied and allowing an unobstructed view of the incision.

The invention discloses a preparation method and an application of a microbial manganese-carbon composite material. The preparation method comprises the following steps of: (1) adding HEPES (hydroxyethyl piperazine ethanesulfonic acid) buffering solution for filtering and sterilizing and MnCl2 into a sterilized culture medium under the aseptic condition, inoculating the culture medium with a manganese oxidizing bacterial solution which grows to the logarithmic phase at an inoculum size of 1%, putting a triangular flask into a swing bed, culturing, centrifuging, collecting a precipitate, removing residual ions on the surface by washing with ultrapure water, and drying; (2) weighing the materials prepared in step (1), mixing the materials with sodium hydroxide serving as an activation agent according to a certain proportion, adding deionized water, stirring so that the materials are completely immersed in the activation agent, drying with a drying box, activating at high temperature, washing with hydrochloric acid until no bubble is generated, washing with deionized water until the raw materials are neutral, drying, and grinding to obtain the composite material. The preparation method of the composite material is practical, is convenient to operate and is suitable for the large-scale production of the composite material. The application of the composite material to the removal of indigo carmine in dyeing waste water finds that the composite material is high in adsorption speed and efficiency and can be widely applied to environmental governance.

The invention discloses a formula for fast measuring ozone in water and a method thereof. The method comprises the following steps of: (1) preparing measuring reagent, respectively weighing 755 parts of sodium dihydrogen phosphate fine powder and 1 part of acid indigo carmine fine powder according to weight ratio, evenly mixing in a mixing cylinder, and sealing and packing according to 0.1g of each bag for later use; (2) firstly performing colorimetric measurement to water sample, adding 12.5mL of water sample to be measured into a cuvette with the diameter of 30mm, adding a bag of the measuring reagent prepared in the step (1) and evenly shaking, taking distilled water as reference, and measuring the absorbency under the condition that the wavelength is 600nm; (3) performing the colorimetric measurement to the water sample again, adding 12.5mL of the water sample to be measured into a measuring reagent and water sample-containing colorimetric bottle in the previous step again and evenly shaking, and measuring the absorbency under the condition that the wavelength is 600nm; and (4) computing the content of the ozone in the water with the formula p=1.071*(A1-2A2) / (0.42*3), wherein p is the concentration (mg / l) of the ozone in the water, A1 is the absorbency measured by the step (2), and the A2 is the absorbency measured by the step (3). The invention has the advantages of being simple in measurement steps, being capable of realizing on-site measurement with an automatic apparatus, and being low in measuring cost.

Abiotic fuel cell and battery designs employing chemical dyes in alkaline solutions are disclosed. The fuel cells and batteries are capable of harnessing electrical power from various carbohydrates, including, but not limited to, glucose; in an anode design that does not require catalysts or membranes to separate half-cell reaction chambers. In certain embodiments, the abiotic fuel cell or battery designs may further employ electrodes, such as high surface area carbon materials and commercial air breathing electrodes, without the use of catalysts for glucose oxidation (i.e., precious metals or biocatalytic species). In further embodiments, organic dyes, including but not limited to, methyl viologen (MV), methylene blue, methylene green, Meldola's blue, indigo carmine, safranin O, and the like, may serve as the electron mediators. In some embodiments, the fuel cells or batteries are capable of generating power on the order of about tens of mW / cm2 from glucose and / or other types of sugars.

Process for preparing disodium 5,5′-indigosulfonate, the feedstock being indigo, this process including the following steps: i) the indigo is subjected to a sulfonation treatment resulting in a mixture that contains 5,5′-indigosulfonic acid, this process including: ii) a reduction treatment is applied to the mixture obtained in step i), and optionally a purification step, so as to obtain a composition including leuco-5,5′-indigosulfonic acid, iii) the leuco-5,5′-indigosulfonic acid is isolated from the composition resulting from step ii), iv) the leuco-5,5′-indigosulfonic acid resulting from step iii) is oxidized to give disodium 5,5′-indigosulfonate.

Process for preparing disodium 5,5′-indigosulfonate, the feedstock being indigo, this process including the following steps: i) the indigo is subjected to a sulfonation treatment resulting in a mixture that contains 5,5′-indigosulfonic acid, this process including: ii) a reduction treatment is applied to the mixture obtained in step i), and optionally a purification step, so as to obtain a composition including leuco-5,5′-indigosulfonic acid, iii) the leuco-5,5′-indigosulfonic acid is isolated from the composition resulting from step ii), iv) the leuco-5,5′-indigosulfonic acid resulting from step iii) is oxidized to give disodium 5,5′-indigosulfonate.

The invention discloses a novel acid dye. The novel acid dye is prepared from the following components in parts by weight: 14 to 16 parts of methyl blue, 31 to 33 parts of gentian violet, 23 to 26 parts of magenta, 31 to 33 parts of Indigo carmine, 13 to 18 parts of iron ion, 2 to 5 parts of alginate, 10 to 12 parts of bean sprout powder, 17 to 20 parts of fish meal, 11 to 18 parts of seed fermentation broth, 21 to 24 parts of radix puerariae powder and 9 to 10 parts of herba houttuyniae. The novel acid dye disclosed by the invention has the advantages of natural property, no odor, fast coloring and low possibility of fading.

The invention discloses a method for rapidly distinguishing normal tea and suspicious tea. According to the method of the invention, acidic indigo carmine is used as an indicator, and potassium permanganate is used an oxidant; quantitative potassium permanganate preferentially reacts with reducing substances in an extracting solution; although the extracting solution contains other reducing substances except tea polyphenol, the total content of the other reducing substances is far less than that of the tea polyphenol; and meanwhile, facts prove that the other reducing substances in the extracting solution do not have too much influence on a distinguishing result. Compared with a national standard method, the normal tea and the suspicious tea can be distinguished rapidly, a reliable basis is provided for market quality inspection, and the method is simple to operate and easy to implement.

Carbohydrate detectors employing abiotic fuel cell designs are disclosed. The detectors produce current output using reactions between chemical dyes in alkaline solutions and carbohydrates, such as glucose. A linear relationship between current output of the detector and glucose concentration has been observed. This relationship may be used with measurements of current output when the glucose concentration is unknown to determine the unknown glucose concentration. In certain embodiments, the abiotic detectors may further employ electrodes, such as high surface area carbon materials and commercial air breathing electrodes, without the use of catalysts (i.e., precious metals or biocatalytic species) for glucose detection Organic dyes, such as methyl viologen (MV), methylene blue, methylene green, Meldola's blue, indigo carmine, safranin O, and the like, may serve as the electron mediators.

The invention provides an automatic analysis method for trace trivalent chromium in water samples, which comprises a low-pressure pump, a sampling valve, a mixer, a reactor, an optical flow cell, an optical detector, a computer processing system, a sample flow path, The analytical instruments for the flow path of the pushing liquid, the masking agent, the oxidizing liquid, and the chromogenic liquid flow are as follows: ① measure the baseline; ② measure the spectrum of trivalent chromium in the sample; ③ draw the working curve; The peak height value of the trivalent chromium spectrogram in the sample is brought into the regression equation of the working curve to calculate the concentration of the trivalent chromium to be measured in the sample. The driving solution is HNO3 aqueous solution, the masking agent is a mixed aqueous solution of ethylenediaminetetraacetic acid and Tween-20, and the oxidizing solution is a mixed solution prepared by potassium periodate, sodium tripolyphosphate, water and phosphate buffer , the chromogenic solution is an aqueous solution of indigo carmine. The method of the invention realizes the direct determination of the trace amount of trivalent chromium in the water sample, simplifies the analysis operation and improves the analysis sensitivity.

The present invention relates to an improved process for preparation of Indigo carmine of Formula (I), in high purity, more than 99.5%.

The invention discloses a DNA (Deoxyribonucleic Acid) electrochemical sensor based on an indigo carmine electrochemical polymer membrane and a preparation method thereof. The DNA electrochemical sensor is a three-electrode system sensor with a working electrode, an auxiliary electrode and a reference electrode, wherein the working electrode is a glassy carbon electrode which is modified by the indigo carmine electrochemical polymer membrane after a 5'-terminal modified amino single-chain probe DNA is covalently fixed. The DNA electrochemical sensor has the characteristics of short response time, low limit of detection, excellent stability and excellent reproducibility.