30results about How to "Rapid Analytical Assay" patented technology

The embodiment of the present invention provides a method for measuring the copper content in the nickel-copper alloy. The method for measuring the copper content in the nickel-copper alloy includes the following steps: sample dissolution, interference separation, determination of copper content, correction of precipitation adsorption, and adjustment of copper content. Calculation; The interference separation is to separate the iron interference element with ammonia; The measurement of the copper content is to adopt the selective decomposition of the combined masking agent composed of thiourea, phenanthroline and ascorbic acid Cu-EDTA complex , and finally titrate the released ethylenediaminetetraacetic acid EDTA with zinc standard solution, thereby calculate the content of copper; the correction of the precipitation adsorption is to dissolve the precipitation with dilute hydrochloric acid to dissolve the copper into the test solution, and measure the copper content by using ICP spectrometry. The copper content in the solution was corrected. The method provided by the invention for measuring the copper content in the nickel-copper alloy can solve the problem of inaccurate detection results of the current copper content in the nickel-copper alloy, and control the relative standard deviation RSD within 0.5%.

The invention relates to a portable powder compact stacking molding device and application thereof. The device comprises a base, a support arranged on the base, an upper pressing die capable of being arranged on the support in a reciprocating moving manner in the vertical direction, a feeding guiding mechanism used in cooperation with the upper pressing die, a sample pressing part located below the upper pressing side and opposite to the upper pressing die, and a digital display supporting mechanism arranged at the bottom of the sample pressing part. The upper pressing die can be arranged on the support through a screw transmission mechanism in the vertical reciprocating moving manner. The portable powder compact stacking molding device is used for stacking molding and sample manufacturing of to-be-detected soil powder based on an X-ray fluorescent spectral analysis method. Compared with the prior art, the portable powder compact stacking molding device has the beneficial effects that the structure is simple, use is convenient, the device is light and capable of being carried, manufactured samples cannot be contaminated and are consistent in compactness, and operability and accuracy for measuring the soil samples through an XRF method are greatly improved.

The invention discloses a method for rapidly screening the difference of rhizoma corydalis and vinegar rhizoma corydalis through a UPLC-MS-MS. The method includes the steps of firstly, collecting to-be-distinguished medicine materials including rhizoma corydalis and vinegar rhizoma corydalis to prepare standard decoction samples; secondly, putting the samples in the UPLC-MS-MS to be analyzed to obtain corresponding mass spectrometric data; thirdly, directly importing the original collected data to a Compound Discoverer 2.1 for data analysis; fourthly, correcting chromatographic peak drifting and aligning chromatographic peaks through a dynamic scheduling and calculating method, and registering substances close in retention time into compounds through a most neighbor clustering method; fifthly, calculating different substances between the samples through variance analysis to determine the difference. Compound spectrometric information is output as an original file, the original file canbe directly imported into a Compound Discoverer 2.1 library to search the compounds without being converted into other formats, the different compounds existing in the medicine material samples can be rapidly locked through the method, and the method is suitable for rapidly analyzing and measuring samples on a large scale.

A rapid determination method for parabens in cosmetics, relates to a method for determination of ingredients in cosmetics, comprising the following steps: A. processing of samples to be tested; B. establishment of a background spectrum database: B1. acquisition Spectral data of cosmetic samples; B2. Obtain spectral data of components to be tested; B3. Convert data format; B4. Obtain the spectral data of the background without the component to be tested; B5. Dimensionality reduction of the background database; C. Obtain the standard spectral database v of parabens; D. Spectral measurement of the cosmetic sample to be tested; E. To be tested Determination of parabens content in cosmetic samples. The invention has high analysis efficiency, low operation intensity, low analysis cost, no need to accumulate a background database without components to be measured, can reduce machine time and reagent loss, has good robustness, and is simple in method, and is very suitable for the analysis of large batches of samples of the same kind Rapid analytical assay.

The invention relates to a method for analyzing and measuring typical metal in a circuit board of discarded electrical equipment and relates to the technology for pre-treating the circuit board of discarded electrical equipment and detecting and analyzing the content of the typical metal element. The method comprises the following steps: collecting a sample of the circuit board part of discarded electrical equipment and then performing the operations of surface dressing, cleaning, and rough and fine grinding on the sample; adding a proper amount of digestion reagent into the prepared sample, digesting the prepared sample by using a microwave digestion device and then extracting metal matter from the discarded circuit board; and using an inductively coupled plasma emission spectrometer to analyze the nature and quantity of the digested sample. According to the method, the operations of sample grinding and digesting are simple, the reagent consumption is less, the analysis result is accurate and reliable, the detection concentration range is wide, the technical problem of difficultly pre-treating the circuit board sample is solved, and the method is suitable for quickly identifying and accurately measuring the typical metal elements in the circuit boards of various discarded electrical products (such as televisions, refrigerators, washing machines, computers, printers, and the like) and the typical metal elements in the corner wastes generated in the circuit board production process.

The invention provides a method for rapidly and non-destructively detecting intracellular astaxanthin in chlorella, comprising the steps of: 1) resuspending algae cells collected from known samples of chlorella suspension with deionized water or phosphate buffer solution, Adjust to a resuspension with a cell density of 6×105~2×106 CFU / mL, and use a flow cytometer to detect the average fluorescence intensity of the algae cell resuspension in the FL1 channel or FL2 channel; the known sample of the chlorella suspension The logarithm of the astaxanthin content and the logarithm of the average fluorescence intensity value of the corresponding measured FL1 or FL2 channel are linearly regressed to obtain a standard curve; 2) prepare the sample to be tested - with deionized water or phosphate buffer resuspend the algae cells collected from the chlorella suspension to be tested, and adjust it to a resuspension of the algae cells to be tested with a cell density of 6×105~2×106 CFU / mL; 3) use a flow cytometer to detect Measure the average fluorescence intensity of the sample in the FL1 channel or FL2 channel, and calculate the astaxanthin content according to the standard curve in step 1). The method of the invention has the characteristics of high detection efficiency.