scholarly journals Nitrate and nitrite in commercial samples of conventional, organic and hydroponic leafy vegetables

2019 ◽  
pp. 812 ◽  
Author(s):  
A.L. Nascimento
Keyword(s):  
Limit Of Detection ◽  
Great Variability ◽  
Leafy Vegetables ◽  
Conventional System ◽  
Fresh Weight ◽  
Hydroponic System ◽  
Capillary Electrophoresis Method ◽  
Electrophoresis Method ◽  
Nitrate And Nitrite ◽  
Nitrite Content

The aim of this research was to investigate along four weeks the nitrate and nitrite levels in commercial samples of leafy vegetables (lettuce, watercress, spinach, and rocket) of different growing systems (hydroponic, conventional and organic) using a capillary electrophoresis method. In all samples, nitrite content was below the limit of detection, while nitrate was quantified. The nitrate concentrations in the leafy vegetables ranged from 239.26 to 7873.00 mg kg-1 in fresh weight, with more expressive values found for lettuce, watercress and rocket in the hydroponic system, while for spinach the highest values were found in the conventional system. However, the lettuce can be highlighted as the vegetable with the lowest content of nitrate and the rocket the vegetable with the highest content of this compound. Despite the great variability, the nitrate levels found for most samples were in accordance with international requirements.

Cyanide, Nitrate and Nitrite Content of Some Leafy Vegetables and Fruits Commonly Consumed in the South-East of Nigeria

2011 ◽  
Vol 10 (12) ◽  
pp. 1190-1194 ◽  
Author(s):  
Friday O. Uhegbu ◽  
Ifeanyi Elekwa ◽  
Emeka E.J. Iweal ◽  
Ijeoma Kanu
Keyword(s):  
Leafy Vegetables ◽  
The South ◽  
Nitrate And Nitrite ◽  
Vegetables And Fruits ◽  
Nitrite Content

scholarly journals KUALITAS MUTU SAYUR KASEPAK (KANGKUNG, SELADA, DAN PAKCOY) DENGAN SISTEM BUDIDAYA AKUAPONIK DAN HIDROPONIK

2020 ◽  
Vol 14 (01) ◽  
pp. 33
Author(s):  
Laela Endah Rahmadhani ◽  
Laily Ilham Widuri ◽  
Parawita Dewanti
Keyword(s):  
Brassica Rapa ◽  
Lactuca Sativa ◽  
Farming Systems ◽  
Leafy Vegetables ◽  
Fresh Weight ◽  
Water Spinach ◽  
Leaf Production ◽  
Hydroponic System ◽  
Ipomoea Aquatica ◽  
Lactuca Sativa L

Aquaponic is considered one of alternative culture system to improve production and quality of leafy vegetables by combining soil less culture and fish farming. Utilization of fish manure contained in waste water provides nutrient sources for growing plants. Three kinds of leafy vegetables including water spinach (Ipomoea aquatica F.), green coral lettuce (Lactuca sativa L.), and bok choi (Brassica rapa L.) were grown using both aquaponic and hydroponic system at the Green House in Serut village, Panti District, Jember Regency, from April to June 2019. Productions of each leafy vegetable were evaluated on both culture systems. Water spinach represented 29.12% higher production in aquaponic than hydroponic system, shown by significant value in plant height, number of leaves, root volume, and leaf fresh weight. Otherwise, bok choi production displayed 17.03% increased in hydroponic than aquaponic system. However, leaf production of lettuce was not significant between hydroponic and aquaponic system. Lettuce production in aquaponic only 1.90% lowest than hydroponic system indicated that lettuce was appropriate to cultivate in both farming systems. Keywords: aquaculture, Brassica rapa L., leaf fresh weight, Ipomoea aquatica F., Lactuca sativa L., soil less culture

scholarly journals Identification of the nitrate and nitrite content in leafy vegetables from the city of Zliten: تحديد محتوى النترات والنتريت في الخضار الورقية من مدينة زليتن

2021 ◽  
Vol 5 (5) ◽  
pp. 131-126
Author(s):  
Ismail A. Ajaj, Zeglam, Z., Benfaid, E., Shneb, M., Rabya A Ismail A. Ajaj, Zeglam, Z., Benfaid, E., Shneb, M., Rabya A
Keyword(s):  
International Standards ◽  
Leafy Vegetables ◽  
Global Standards ◽  
Nitrate Concentrations ◽  
Nitrate And Nitrite ◽  
Agricultural Areas ◽  
The City ◽  
Nitrite Content

    The study identifies the nitrate (NO3) and nitrite (NO2) content in leafy vegetables (parsley, chard, coriander) in three agricultural areas in Zliten (Azdo, Dafniya, Madjer) using the colorimeter dr / 980 device, and assesses whether the content is within the comparatively with allowable concentrations. The results obtained from this study show that the nitrate concentrations in all samples examined are within the global standards, with the highest level of 5.5 ppm found in chard samples collected from the area of Azdo. As for nitrite, the concentrations found in the studied samples are higher than nitrate concentrations. Overall, the nitrate and nitrite content are found to be within the permitted concentrations based on international standards, where the highest concentration of nitrite of 60 ppm is recorded in parsley samples from the Dafniya area.

scholarly journals Evaluation of the nitrate and nitrite content of vegetables commonly grown in Slovenia

2017 ◽  
Vol 12 (2) ◽  
Author(s):  
Veronika Kmecl ◽  
Tea Knap ◽  
Dragan Žnidarčič
Keyword(s):  
European Union ◽  
Human Body ◽  
Daily Intake ◽  
Agricultural Area ◽  
Segmented Flow ◽  
Maximum Permissible Level ◽  
Eu Legislation ◽  
Permissible Level ◽  
Nitrate And Nitrite ◽  
Nitrite Content

Nitrate (NO<sub>3</sub><sup>–</sup>) and nitrite (NO<sub>2</sub><sup>–</sup>) levels of a total 1195 samples of nine different vegetables (lettuce, potato, cabbage, carrot, string beans, tomato, cucumber, cauliflower and pepper) collected at several locations of an intensive agricultural area in Slovenia were analysed during a period of 13 years. The content of NO<sub>2</sub><sup>–</sup> and NO<sub>3</sub><sup>–</sup> ions in commercial mature samples was determined using a segmented flow analyser. The average NO<sub>3</sub><sup>–</sup> content was the highest in lettuce (962 mg/kg), cabbage (795 mg/kg), string beans (298 mg/kg), carrot (264 mg/kg), cauliflower (231 mg/kg), potato (169 mg/kg) and was moderately high in cucumber (93 mg/kg) and pepper (69 mg/kg). A low NO<sub>3</sub><sup>–</sup> content was found in tomato (2<sup>–</sup> did not exceed 0.5 mg/kg, with the exception of potato (1.08 mg/kg). Six samples of lettuce exceeded the maximum permissible level of NO<sub>3</sub><sup>–</sup> according to current European Union (EU) legislation. Based on the results of our investigation, we assessed the approximate daily intake (DI) of NO<sub>3</sub>– and NO<sub>2</sub><sup>–</sup> to human body. The results indicated that with the consumption of potato, the daily intake per inhabitant is close to the acceptable DI permitted in EU.

scholarly journals The Application of a Cadmium Reducer and a Diazotisation Reaction for the Determination of Nitrate and Nitrite in Tobacco / Über die Anwendung des Cadmium-Reduktors und der Diazotierung zur Bestimmung von Nitrat und Nitrit im Tabak

1965 ◽  
Vol 3 (2) ◽  
Author(s):  
U. Dölberg
Keyword(s):  
Quantitative Analysis ◽  
Reduction Method ◽  
Limit Of Detection ◽  
Nitrate And Nitrite ◽  
Inferior Limit

AbstractNitrate is reduced by means of a cadmium reducer and spectrophotometrically determined in the form of nitrite by a diazotisation reaction. The results obtained by application of the described method to tobacco extracts correspond well to those resulting from the earlier described dimethylphenol procedure. Owing to its better sensitivity and specifity the reduction method is particularly suitable for the quantitative analysis of smallest amounts of nitrate. Quantities of 0.03 % of nitrate can be determined without difficulties. The inferior limit of detection is 0.001 %.

Sign in / Sign up

Export Citation Format

Share Document