Determination of nitrate in meat products and cheese by gas-liquid chromatography with electron-capture detection

Enzymic method for the determination of nitrite in meat and fish products

“…Nitrite may be underestimated when samples contain ascorbic acid or sulfur dioxide, thus diminishing the color developing process. 3 Other methods have been developed, including gas chromatographic (GC), 4,5 high-performance liquid chromatographic (HPLC) [6][7][8][9] or ion-interaction chromatographic 10 procedures. While feasible, the use of HPLC and/or GC is expensive and requires complicated clean-up, a derivatization stage and/or special column materials.…”

Enzymic method for the determination of nitrite in meat and fish products

“…Nitrite may be underestimated when samples contain ascorbic acid or sulfur dioxide, thus diminishing the color developing process. 3 Other methods have been developed, including gas chromatographic (GC), 4,5 high-performance liquid chromatographic (HPLC) [6][7][8][9] or ion-interaction chromatographic 10 procedures. While feasible, the use of HPLC and/or GC is expensive and requires complicated clean-up, a derivatization stage and/or special column materials.…”

Determination of15N-Labelled Nitrate and Nitrite by Mass Fragmentography and Its Application to Plant Material

“…Mass fragments m/z 239 of the TMS ester of 4-15NOz-2-SBP and m/z 225.5 of the TMS ester of 5-chlorobenzotriazole were used for the SIM. (1) where a and b are the peak heights of the TMS ester of 4-15N02-2-SBP at m/z 239 derived from NO r 15 N and that of the TMS ester of 4_ 14 N02-2-SBP at m/z 238 derived from N03 _ 14 N, and c is the peak height of the internal standard at m/z 225.5. K is the peak height ratio, that is, m/z 239/m/z 238 in the case of the TMS ester of 4_ 14 NO r 2-SBP only, and is 0.182.…”

A Fast and Highly Selective Nitrite Sensor Based on Interdigital Electrodes Modified With Nanogold Film and Chrome-Black T

“…But toxic agents and the expensive instruments should be used in the detection, which has impeded its development. Akio Tanaka used an electron capture detector to analyze nitrite in meat and cheese by gas-liquid chromatography (Tanaka et al, 1982). A method was developed for determination of inorganic anions, including nitrite (NO 2 -) and nitrate (NO 3 -) in seawater by ion chromatography (Ito et al, 2012).…”

Enzymic method for the determination of nitrite in meat and fish products

“…Nitrite may be underestimated when samples contain ascorbic acid or sulfur dioxide, thus diminishing the color developing process. 3 Other methods have been developed, including gas chromatographic (GC), 4,5 high-performance liquid chromatographic (HPLC) [6][7][8][9] or ion-interaction chromatographic 10 procedures. While feasible, the use of HPLC and/or GC is expensive and requires complicated clean-up, a derivatization stage and/or special column materials.…”

Determination of15N-Labelled Nitrate and Nitrite by Mass Fragmentography and Its Application to Plant Material

“…Mass fragments m/z 239 of the TMS ester of 4-15NOz-2-SBP and m/z 225.5 of the TMS ester of 5-chlorobenzotriazole were used for the SIM. (1) where a and b are the peak heights of the TMS ester of 4-15N02-2-SBP at m/z 239 derived from NO r 15 N and that of the TMS ester of 4_ 14 N02-2-SBP at m/z 238 derived from N03 _ 14 N, and c is the peak height of the internal standard at m/z 225.5. K is the peak height ratio, that is, m/z 239/m/z 238 in the case of the TMS ester of 4_ 14 NO r 2-SBP only, and is 0.182.…”

A Fast and Highly Selective Nitrite Sensor Based on Interdigital Electrodes Modified With Nanogold Film and Chrome-Black T

“…But toxic agents and the expensive instruments should be used in the detection, which has impeded its development. Akio Tanaka used an electron capture detector to analyze nitrite in meat and cheese by gas-liquid chromatography (Tanaka et al, 1982). A method was developed for determination of inorganic anions, including nitrite (NO 2 -) and nitrate (NO 3 -) in seawater by ion chromatography (Ito et al, 2012).…”

Enzymic method for the determination of nitrite in meat and fish products

“…Nitrite may be underestimated when samples contain ascorbic acid or sulfur dioxide, thus diminishing the color developing process. 3 Other methods have been developed, including gas chromatographic (GC), 4,5 high-performance liquid chromatographic (HPLC) [6][7][8][9] or ion-interaction chromatographic 10 procedures. While feasible, the use of HPLC and/or GC is expensive and requires complicated clean-up, a derivatization stage and/or special column materials.…”

Determination of15N-Labelled Nitrate and Nitrite by Mass Fragmentography and Its Application to Plant Material

“…Mass fragments m/z 239 of the TMS ester of 4-15NOz-2-SBP and m/z 225.5 of the TMS ester of 5-chlorobenzotriazole were used for the SIM. (1) where a and b are the peak heights of the TMS ester of 4-15N02-2-SBP at m/z 239 derived from NO r 15 N and that of the TMS ester of 4_ 14 N02-2-SBP at m/z 238 derived from N03 _ 14 N, and c is the peak height of the internal standard at m/z 225.5. K is the peak height ratio, that is, m/z 239/m/z 238 in the case of the TMS ester of 4_ 14 NO r 2-SBP only, and is 0.182.…”

A Fast and Highly Selective Nitrite Sensor Based on Interdigital Electrodes Modified With Nanogold Film and Chrome-Black T

“…But toxic agents and the expensive instruments should be used in the detection, which has impeded its development. Akio Tanaka used an electron capture detector to analyze nitrite in meat and cheese by gas-liquid chromatography (Tanaka et al, 1982). A method was developed for determination of inorganic anions, including nitrite (NO 2 -) and nitrate (NO 3 -) in seawater by ion chromatography (Ito et al, 2012).…”