52results about How to "Reduce analysis steps" patented technology

The invention discloses a method for measuring and evaluating quality of a peanut raw material for protein processing. The method for measuring comprises measuring a fruit shape score, total protein content, leucine content, arginine content, conarachin I content and mass percentage content of subunit having molecular weight of 23.5 kDa in total proteins of a peanut sample to be measured, substituting the above measured values into the formula (1) and acquiring protein powder quality of the peanut sample to be measured. The method reduces analysis steps and is suitable for enterprise application. A peanut protein processing raw material quality evaluation model is built. Through six peanut quality characteristics, the peanut protein powder quality is determined. A near-infrared analyzer can conveniently and fast forecast indexes such as amino acids in the model. Through near-infrared analyzing detection of peanut kernels, all indexes in the forecasting model can be acquired simultaneously and the damage to peanut kernels is avoided. The method is convenient and fast.

The invention discloses a method for quickly screening and detecting azo dyes forbidden in textile materials, leathers and dyes using gas chromatography mass spectrometry, which comprises the following steps: 1) preparing a sample, 2) subjecting the sample to reduction reaction, 3) extracting the sample, 4) performing the gas chromatography mass spectrometry on the sample, 5) screening decision: compared with the GC-MS analysis result of a standard solution, if the retention time and the mass spectrum of the aromatic amine in the sample keep with standards, the sample is judged as a suspicious positive sample, otherwise it is a negative sample and directly judged as a qualified sample. The sample pre-treatment time is shortened, the cost is reduced, the detection time is shortened, the operation step is simple, the operation is convenient, the operation time is short, the operation cost is low, the detection efficiency is improved; the aromatic amine in the sample is detected by a gas chromatography mass spectrometer, color interference problem is not existed, the sample matrix is effectively prevented from being infected, and the judgment accuracy is high, thus the method is not only suitable for textile materials, but also suitable for other products such as leathers and dyes.

The invention discloses a method for measuring iron / calcium ratio in an iron-calcium core-spun yarn, which comprises the following steps: preparing standard solutions which comprise a calcium standard solution and an EDTA (ethylene diamine tetraacetic acid) standard solution, and calculating the concentration C of the EDTA standard solution; separating iron powder and calcium particles in the iron-calcium powder with a magnet, and adding water and the EDTA standard solution into the separated iron powder to prepare a sample solution; and titrating the sample solution with the calcium standard solution, and calculating the iron / calcium ratio in the iron-calcium core-spun yarn according to the concentration of the calcium standard solution and the concentration C of the EDTA standard solution. The technical scheme disclosed by the invention can be used for accurately measuring the iron / calcium ratio in the iron-calcium core-spun yarn, and is simple to operate.

The invention discloses a method used for liquid chromatographic analysis on biuret in compound fertilizer, which is characterized in that reversed-phase liquid chromatography is adopted; the flowing phase is phosphate buffer solution with the pH value of 6.0; the proportion of carbinol and buffer solution is 5:95; the flowing speed is 1.2ml / min; the detection wavelength is 200nm; a chromatographic column can resist pure water phase; C18 filler is provided and the granularity of the C18 filler is 5 mum; the column length is 250mm and the internal diameter of the column is 4.6mm; the content of biuret in the harmful compositions of the compound fertilizer is calculated by an external standard method; the liquid chromatography quantitative analysis is carried out on the biuret contained in the compound fertilizer by an ultraviolet detector; when the consistency of the biuret is 0.01mg / ml to 0.2mg / ml, the biuret has good linear relationship with the linear correlation coefficient of morethan 0.999; the method requires no predisposal on the analyzed sample, thus reducing a plurality of analysis steps and shortening the analysis time; the method is exact and reliable and has economical detection cost.

Peptide nucleic acid probes for detection of red tide organism Pyrodinanophyllum and their applications, involving a molecular probe, providing a fluorescently labeled peptide nucleic acid probe capable of rapidly detecting and identifying harmful red tide organisms Pyrodinanophyllum and its design method and application. The molecular name is PNATP28S01, and the molecular structure composition sequence is [Flu]-OO ATG CCA TCT CAA GA, which is electrically neutral. The four monomers carry ATGC4 bases and are connected end to end to form a chain structure. When designing probes, the rDNA target sequence is sorted by nucleotide sequence software and the sequences of closely related organisms obtained from major nucleic acid data; the conserved sequence of the target species is selected, and the specific sequence is searched for matching, and the The specific sequence of the conserved genus and species in the known sequence; detection of probe sequence parameters; design and calculation of PNA probes to obtain negative and positive control probes.

The invention discloses a white spirit cold-soaking and countercurrent extraction method of polygonatum odoratum polysaccharide in a brewing technique and an online quality control method thereof. The extraction method comprises the steps of (1) slicing polygonatum odoratum or cutting the polygonatum odoratum into sections or grinding the polygonatum odoratum into granules; (2) cold-soaking the polygonatum odoratum in white spirit with alcohol concentration-volume ratio being 45-55% according to a charge rate of 1: (7.0-8.0) by mass; and (3) implementing countercurrent extraction by using white spirit of which the alcohol concentration-volume ratio is 45-55%. According to the optimized solution, the polygonatum odoratum is sliced or cut into sections or ground into granules and is pressed flat by external force. The method disclosed by the invention is direct and high in efficiency, overcomes difficulty in filtration, avoids contamination from moulds and can prevent polysaccharide which has relatively large molecular weight from precipitating in healthcare wine, thus being an ideal method for extracting polygonatum odoratum in the white spirit brewing technique. The solution of the control method does not need pre-treatment on a sample, comprises few analysis step and generates few error influence factors, consumes little time, and is capable of meeting demands of rapid determination and online quality control of samples in batches.

A three-dimensional terrain trafficability analytical method for an autonomous land vehicle comprises the step of information perception, wherein movement state information and environmental information of the current vehicle are obtained; the step of track searching and generation, wherein track preliminary searching is carried out according to the current vehicle position and a final target position, and a local track set of possible movements of the vehicle is generated; the step of terrain analysis, wherein the contour line of the current terrain is drawn according to obtained terrain altitude data, the intersection point of a candidate track and the contour line is found according to a vehicle speed v, the terrain characteristics of track curved sections formed by a lower intersection point of the contour line and the current position of the autonomous land vehicle are analyzed, and a basic terrain factor is calculated; the step of trafficability analysis, wherein the cost of each track curved section formed when the vehicle passes is calculated by combining dynamic constraints and kinematical constraints of the vehicle, so that a cost chart is constructed; and the step of route planning, wherein the optimal route is searched with the cost chart serving as heuristic information. The three-dimensional terrain trafficability analytical method for the autonomous land vehicle has the advantages of being simple in principle, easy and convenient to operate, high in identification accuracy, efficient in calculation and the like.

The invention discloses a method and a device for quickly oxidizing ammonia nitrogen and relates to the technical field of analytical instruments. The invention aims at the problems that the conventional ammonia nitrogen oxidation method is time-consuming and complex in operation steps and does not have special ammonia nitrogen oxidation device. The method comprises the following steps: a, preheating ammonia nitrogen solution; and b, adding oxidant and oxidizing the ammonia nitrogen into nitrite nitrogen. The device comprises an ammonia nitrogen solution conveying branch pipe, an oxidant conveying branch pipe and a container, wherein the container is communicated with the ammonia nitrogen solution conveying branch pipe and the oxidant conveying branch pipe respectively and is used for outputting nitrite nitrogen reactant; and a heater is arranged at the output end of the ammonia nitrogen solution conveying branch pipe and is used for preheating the ammonia nitrogen solution. The method and the device is particularly suitable for measuring the ammonia nitrogen content by gas phase molecular spectroscopy and performing oxidation pretreatment on the ammonia nitrogen in the solution.