[Measurement of atmosphere NO2 amounts and angle spacial distribution using zenith-light spectra and sky-light spectra].

A novel approach to retrieving atmosphere NO2 slant column density is described, in which the sunlight scattered in the zenith direction and the skylight are used as the light sources. The slant column density of the same azimuth but different obliquities, which are between 0.5 x 10(16) and 11 x 10(16) molecule x cm(-2), with the angle from 85 degrees to 10 degrees, as well as that of the same obliquity but different azimuths, which are between 10(16) and 10(17) molecule cm(-2), were calculated.

[Observation and analysis of solar ultraviolet irradiance spectrum in Chengdu area].

The solar ultraviolet irradiance spectrum in Chengdu area from March to July in 2006 was observed with an ultraviolet CCD optical multi-channel analyzer. According to the observation results, some analysis of the basic characteristics was made. The analysis of the solar ultraviolet irradiance spectrum showed that the solar ultraviolet irradiance is weak in the morning and in the evening but strong at noon, reaches the strongest point in June, and reversely correlates with the change in SZA (solar zenith angle); the ratio of irradiance flux of UVB to UVA is less than 0.

[Simultaneous determination of iron, copper and cobalt in food samples by diode array detection-flow injection analysis using partial least squares calibration model].

A flow injection-CCD-diode array detection spectrophotometric method using partial least squares (PLS) algorithm for the simultaneous determination of iron, copper and cobalt in food samples has been established. The method was based on the chromogenic reaction between metallic ions and 5-Br-PADAP in the presence of acetic acid-acetic sodium buffer solution (pH 5) containing 30 g x L(-1) ascorbic acid and 2% (phi) Triton X-100. The overlapped spectra of these complexes were collected by CCD diode array detector and the multi-wavelength absorbance data were processed using partial least squares algorithm.

[Optical multi-channel detection and analysis on solar ultra-violet irradiance spectrum].

The present paper reports a new type of ultraviolet CCD optical multi-channel analyzer and its application to detecting solar ultraviolet irradiance spectrum. Spectral detecting range of 200-1 100 nm, spectral resolution of 0.1 nm and detecting sensitivity of 0.

[Selected enhancement of different order stokes lines of SRS by using fluorescence of mixed dye solution].

A new method to enhance the intensity of the different orders of Stokes lines of SRS by using mixed dye fluorescence is reported. The Stokes lines from the second-order to the fifth-order of CCl4 were enhanced by the fluorescence of mixed R6G and RB solutions in different proportions of 20:2, 20:13 and 20:40 (R6g:Rb), respectively. It is considered that the Stokes lines from the second-order to the fifth-order are near the fluorescence peaks of the three mixed solutions, and far from the absorption peaks of R6g and Rb, so the enhancement effect dominates the absorption effect; as a result, these stokes lines are enhanced.

[Measurement of NO2 concentration in atmosphere in Chengdu by solar spectra].

In the present paper, a new improved method for measuring NO2 concentration of atmosphere by using differential optical absorption spectroscopy of solar spectrum was reported. The sample solar spectra were collected in Chengdu city and Xiling Mountain respectively by a CCD optical multi-channel analyzer. With the upper atmosphere solar spectrum as the reference spectrum, by fitting the sample spectrum and the reference spectrum using least-square method in five spectrum ranges, the various NO2 concentrations (vertical column density) of 3.

[CCD-array detection-flow injection analysis of oligomeric: proanthocyanidins in health food].

A flow-injection-CCD array detection spectrophotometry for the determination of oligomeric proanthocyanidin (OPC) in health foods was developed in the present paper, based on the reaction that OPC can form red anthocyanidin in hydrochloric acid medium with ferric ion as a catalytic agent. The absorption spectrum of OPC was scanned and the absorbance at 545 nm was determined by flow injection with CCD-array detector. The influencing factors of the chromogenic reaction and parameters of the flow injection analysis were optimized.

[Investigations of transient time-dependent spectral multi-channel measurement for shocked KCl crystal].

In this paper, the authors reported a new method for measuring transient time-dependent spectra using multi-fiber delay coupler and optical multi-channel analysis technique. The fiber delay coupler consists of five fibers with different lengths and its time-delay between two fibers is determined by the different fiber lengths. The light beams that came from the fiber coupler were coupled by a lens system into the slit of a spectrograph and formed a spectral pattern on the focus plane of the spectrometer.

[Simultaneous and real-time collection by multi-fiber coupling and optical multi-channel analyzer].

A new kind of instrument and method for simultaneous and real-time collection of multi-object spectra by using multi-fiber coupling and Optical Multi-channel Analysis (OMA) was reported. The spectral signals of one object, three objects and five objects were collected successfully in experiments. The spatial resolution of 0.

[Double light beam multi-channel analysis for laser induced fluorescence spectroscopy].

The incident pulse intensity wave will cause the induced fluorescence wave, which will lead to the obvious error of experiment results. A double-light-beam correlation method between the incident laser and the fluorescence was used to decrease such error efficiently in the experiments. A good correlation factor over 0.

[Study on a sensitive setup of capillary electrophoresis with laser induced fluorescence detector and its application].

Objective: To develop a setup of capillary electrophoresis with laser induced fluorescence detector for separating and detecting DNA fragments and protein.

Methods: The setup is assembled of He-Ne Laser with 543.5 nm as the excitation light, filter, monochromator, photomultiplier tube and a computer for controlling the system and collecting the electropherograms.

[Simultaneous determination of copper and iron by flow-injection catalytic kinetic spectrophotometry with multi-channel detector].

The simultaneous determination of copper and iron by catalytic kinetic spectrophotometric method with back propagating artifical neural net (BP-ANN) was studied based on the catalysis of Cu(II) and Fe(III) to the reaction of rhodamine B hydrogen peroxide in the range of pH 3-9. The determination was performed by the construction of pH gradient and a CCD-diode array detector with a microcomputer. The optimum conditions of reaction and flow injection were studied.

[Investigation of multi-channel collecting and temperature calculating by using minimum error principle for thermal radiation spectra].

A new kind of method of multi-channel acquisition of thermal radiation spectra and temperature calculating was reported in this paper. Employing a tungsten lamp as thermal source, using an optical multi-channel analyzer(OMA) to collect the radiation spectra, the measured temperatures were calculated by using optimum simulation between the measured spectra and Planck black body radiation curves at the determine temperatures according to the minimum errors principle. The results are agreement with standard values, and the errors are near 1%.