TITLE:
Physicochemical and Microbiological Properties of Bissap (Hibiscus sabdariffa) and Ginger (Zingiber officinale (L) Rose) Juices Sold in the Western Part of Abidjan (Côte d’Ivoire)
AUTHORS:
Gnamien Marcel Ahon, Gbouhoury Eric-Kévin Bolou, Mamadou Fofana, Kouakou Ernest Amoikon
KEYWORDS:
Juice, Hibiscus sabdariffa, Zingiber officinale, Chemical Composition, Microbiology
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.12 No.6,
June
24,
2022
ABSTRACT: Juices
made from the calyx of Hibiscus
sabdariffa (Malvaceae), commonly called Bissap, and the rhizome of Zingiber officinale (Zingiberaceae),
known as Gnamankoudji, are widely consumed in Côte d'Ivoire. The artisanal
preparation of these juices often makes their quality problematic. The aim of
this study is to determine some physicochemical and microbiological properties
of these drinks sold in the city of Abidjan. To do this, samples of Bissap and
Gnamankoudji juices were collected near schools in the Mamie Adjoua (Yopougon)
and Abobodoumé (Attécoubé) districts. Physico-chemical and microbiological
analyses were performed on these collected samples. The results show that the
Bissap and Gnamankoudji juices have an acid pH (2.47 and 3.71), a low protein
content (0.78% and 2.11%) and a high water content (80.13% and 85.21%),
respectively. The reducing sugar content ranged from 1.20% to 3.34%, with high
total sugar (695 mg/mL and 812 mg/mL), low ash (0.70 ± 0.07; 0.91 ± 0.01). On
the other hand, these juices contain variable concentrations of minerals from
one site to another (magnesium, calcium, phosphorus, potassium and iron).
Potassium is the most abundant mineral element, followed by phosphorus and
magnesium. Moreover, it is observed that the Gnamankoudji juices contain
vitamin C (4.67 to 5.58 mg/100mL), contrary to the Bissap juice. The
microbiological analysis indicates the presence of aerobic mesophilic germs
(AMG) but a total absence of pathogenic germs in all juices. The important
presence of nutrients and the total absence of pathogenic germs in these drinks
justify their regular consumption by the population.