Quantitative determination of peroxide value of edible oil by algorithm-assisted liquid interfacial surface enhanced Raman spectroscopy.

Advanced process analytical tools for identification of adulterants in edible oils - A review.

Advanced process analytical tools for identification of adulterants in edible oils – A review

Lab‐on‐paper surface‐enhanced Raman spectroscopy platform based on self‐assembled Au@Ag nanocube monolayer for on‐site detection of thiram in soil

Rapid detection of trace formaldehyde in food based on surface-enhanced Raman scattering coupled with assembled purge trap.

Accurate determination of the gutter oil represents a major food safety challenge. Here, we propose to use the surface enhanced Raman spectroscopy (SERS) with silver nanorod array substrates to detect the capsaicin, a marker of the gutter oil that is difficult to remove. The capsaicin has several characteristic SERS peaks at Δv = 807 cm−1, Δv = 1, 264 cm−1, and so forth, which correspond to the C39-C37-C43 stretching vibrational mode at the alkyl chain, the ring stretching vibrational mode, and so forth, confirmed by our density functional theory calculation. This SERS-based method enabled the rapid and highly sensitive detection of the gutter oil with minimum pretreatment. The concentration dependent SERS investigation shows that the SERS intensity of these characteristic peaks has a linear relationship with the capsaicin concentration when 1 mg/L < C < 60 mg/L. By combining a liquid phase extraction method and the SERS detection strategy, the capsaicin concentration as low as 30 mg/L can be detected from inoculated corn oil samples.

Rapid identification of gutter oil by detecting the capsaicin using surface enhanced Raman spectroscopy

The utility model discloses a convenient the solar energy white light LED street lamp of maintenance, white light LED lamp body passes through bolt fixed connection at the lamp pole tip, the lamp pole welding is in cylinder section of thick bamboo one side, connecting rod end connection solar panel, the cylinder barrel casing connects at the lamp pole surface, skin weld has the jib in the lamp pole top, the pulley is connected to the jib lower extreme, the welding of horizontal pole both ends is at cylinder section of thick bamboo internal surface middle part, the wire rope other end passes through pulley surface spout and connects on the runner surface, micro motor fixed connection is at lamp pole lower part internal surface, the runner is connected in pivot one end, the pivot other end is pegged graft at the micro motor inner chamber, the switch mounting is at the micro motor upper surface. Information transmission relay has aforesaid street lamp. Only need simple console switch in when maintenance, just can go up and down at will white light LED lamp body and solar panel's height, great the raising the efficiency of operation of giving the maintenance electrician has just reduced the danger of maintenance electrician at the during operation.

Solar energy white light LED street lamp, information transmission relay of convenient maintenance

The invention discloses a slit device which comprises a cam (1), a fork frame (CJ), a first hard plate (CK1), a second hard plate (CK2), a third hard plate (CK3) and a slide rail, wherein a slit between the first hard plate (CK1) and the third hard plate (CK3) can serve as an optical slit, and the width of the slit is a value indicated by a cam scale. A minitype raman scattering tripolycyanamide detection spectrum device is provided with the cam. The slit device provided by the invention can prevent corrosion, further can prevent accuracy change due to bearing unevenness caused by bearing abrasion, and can keep the accuracy unchangeable.

Slit device and minitype raman scattering tripolycyanamide detection spectrum device

A cam has an outer contact surface, a cavity, an inner contact surface, and a rotary shaft; the cavity is a round blind hole opened on the bottom surface of the cam, and the cavity axis overlaps with that of the rotary shaft; the inner contact surface overlaps with a cylindrical surface of the cavity interface; the outer contact surface is a cylindrical surface, and the outer contact surface axis does not overlap with the rotary shaft axis; the outer contact surface axis is parallel to the rotary shaft axis; the outer contact surface diameter is bigger than the inner contact surface diameter; a limit wall is arranged between the outer and inner contact surfaces; the top surface of the cam is provided with a scale line; the scale line is a straight line, a delay line of the scale line penetrates the rotary shaft axis, and the scale line cannot penetrate the rotary shaft axis; the scale line is marked with the thickness value of the limit wall. A slit unit, a minisize Raman scattering spectrum device, and the cam having said structures are provided; the cam can prevent wearing, and can prevent precision changes caused by unevenness of a wearing bearing; the cam can keep the precision unchanged.

Nie Xinming

Papers

Rapid identification of gutter oil by detecting the capsaicin using surface enhanced Raman spectroscopy

Solar energy white light LED street lamp, information transmission relay of convenient maintenance

Slit device and minitype raman scattering tripolycyanamide detection spectrum device

Cam, slit unit, and minisize Raman scattering spectrum device