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UNIVERSIDAD NACIONAL INTERCULTURAL DE LA
AMAZONIA
FACULTAD DE INGENIERIA Y CIENCIAS
AMBIENTALES
CARRERA PROFESIONAL DE INGENIERIA
AGROINDUSTRIAL
IMFROME Nº 03: DETERMINACION DE LA
DENSIDAD
DOCENTE : Ing. Ing. Iris Ruiz Yance..
ASIGNATURA : Análisis de Producto Agroindustrial..
ESTUDIANTES : Froy Flauber Ynga Canaico.
CICLO : VI
F. ENTREGA : 14/11/18.
YARINACOCHA - PERÚ
2018
I. RESULTADO.
1.1. Tabla de los cálculos de la densidad del jugo de papaya, la leche y el
aceite.
MUESTRA R WPV WPH20 WP
muestra
Densímetro Densidad
Relativa
Densidad
Absoluta
JUGO DE
PAPAYA
R1
88 gr 138 gr 139 gr 1038 1,02 9,99
R2
88 gr 139 gr 1110 1,02 9,99
R3
88 gr 139 gr 1132 1,02 9,99
LECHE R1
90 gr 140 gr 141 gr 1,02 9,99
R2
90 gr 141 gr 1,02 9,99
R3
90 gr 140 gr 1 9,8
ACEITE R1
89 gr 137 gr 133 gr 0,92 9,02
R2
89 gr 133 gr 0,92 9,02
R3
89 gr 133 gr 0,92 9,02
CALCULOS DE LA DENSIDAD RELATIVA Y ABSOLUTA.
1.1. Relativa.
DRelativa =
𝐏𝐄𝐒𝐎𝐦𝐮𝐞𝐬𝐭𝐫𝐚−𝐏𝐄𝐒𝐎𝐩𝐯
𝐏𝐄𝐒𝐎𝐇𝟐𝐎−𝐏𝐄𝐒𝐎𝐩𝐯
 Jugo de papaya m1. DRelativa =
𝟏𝟑𝟗−𝟖𝟖
𝟏𝟑𝟖−𝟖𝟖
= 1,02
 Jugo de papaya m2. DRelativa =
𝟏𝟑𝟗−𝟖𝟖
𝟏𝟑𝟖−𝟖𝟖
= 1,02
 Jugo de papaya m3. DRelativa =
𝟏𝟑𝟗−𝟖𝟖
𝟏𝟑𝟖−𝟖𝟖
= 1,02
 Leche m1. DRelativa =
𝟏𝟒𝟏−𝟗𝟎
𝟏𝟒𝟎−𝟗𝟎
= 1,02
 Leche m2. DRelativa =
𝟏𝟒𝟏−𝟗𝟎
𝟏𝟒𝟎−𝟗𝟎
= 1,02
 Leche m3. DRelativa =
𝟏𝟒𝟎−𝟗𝟎
𝟏𝟒𝟎−𝟗𝟎
= 1
 Aceite m1. DRelativa =
𝟏𝟑𝟑−𝟖𝟗
𝟏𝟑𝟕−𝟖𝟗
= 0,92
 Aceite m2. DRelativa =
𝟏𝟑𝟑−𝟖𝟗
𝟏𝟑𝟕−𝟖𝟗
= 0,92
 Aceite m3. DRelativa =
𝟏𝟑𝟑−𝟖𝟗
𝟏𝟑𝟕−𝟖𝟗
= 0,92
1.3. Absoluta.
Se multiplica el resultado de la densidad relativa por (9.8) y (1gr/𝑚3
).
 Jugo de papaya m1. DAbsoluta = 1,02 x 9,8 x (1gr/𝑚3
) = 9,99
 Jugo de papaya m2. DAbsoluta = 1,02 x 9,8 x (1gr/𝑚3
) = 9,99
 Jugo de papaya m3. DAbsoluta = 1,02 x 9,8 x (1gr/𝑚3
) = 9,99
 Leche m1. DAbsoluta = 1,02 x 9,8 x (1gr/𝑚3
) = 9,99
 Leche m2. DAbsoluta = 1,02 x 9,8 x (1gr/𝑚3
) = 9,99
 Leche m3. DAbsoluta = 1 x 9,8 x (1gr/𝑚3
) = 9,8
 Aceite m1. DAbsoluta = 0,92 x 9,8 x (1gr/𝑚3
) = 9,02
 Aceite m2. DAbsoluta = 0,92 x 9,8 x (1gr/𝑚3
) = 9,02
 Aceite m3. DAbsoluta = 0,92 x 9,8 x (1gr/𝑚3
) = 9,02
II. DISCUSION.
 En la práctica realizada el valor obtenido sobre la densidad de la leche fue
de 1.02 a 1 pero el valor establecido para la leche por la NORMA NTE
INEN 009:2012 establece un rango entre 1.028 – 1.032 por lo que vemos
en la primer y segunda muestra que nuestro valor está muy cerca de lo
permitido, pero en la muestra tres no se encuentra en el rango esto se
debe probablemente fue añadido alguna sustancia como agua o suero.
 la densidad de la leche entera depende de las fracciones de grasa sólida
y líquida que estén presentes, lo cual está determinado tanto por la
temperatura de trabajo, como por la historia térmica de la muestra
(McCarthy et al., 2009)
 El CODEX nos da unos intervalos de densidad para cada tipo de aceite
con el fin de poder identificarlo y verificar su buen estado. En la práctica
de laboratorio se determinaron la densidad de un tipo de aceite pero en
diferentes muestras: aceite vegetal de soya.
 Bernal de Ramírez, I. (1993). menciona que la densidad del aceite
cambia con la temperatura; conforme aumenta la temperatura, el aceite
se dilata, y por tanto su densidad disminuye; por ello en un estudio es
necesario expresar la densidad del aceite en relación a la temperatura.
 Bernardini. E. (1991). manifiesta que para mediciones exactas no es
recomendable emplear picnómetros con volúmenes mayores a 30 ml.
III.COMCLUSION.
 Se ha establecido la densidad de la leche y obtuvimos 1.02 y 1 g/cm3 a 28 °C
con la densidad de la norma NORMA NTE INEN 009:2012 que es mínimo
1.028 y máximo 1.032 esto a una temperatura de 20 ° C, podemos decir que
la leche analizada está dentro del rango permitido, por lo cual es posible que
esta leche no ha sido adulterada.
 El método del picnómetro es un método muy utilizado para la determinación
de la densidad, debido a que si es utilizado correctamente da valores muy
precisos.
 Las densidades halladas para las muestras de aceite de soya fue 0.92
respectivamente, los cuales están dentro de los intervalos bibliográficos; este
resultado nos indica que el aceite analizado estaba en buen estado.
IV. BIBLIOGRAFIA.
 Ciro, A. (1993). Manual de manejo y análisis alimentario postcosecha de
granos a nivel rural. Oficina Regional de la FAO América latina y el Caribe.
Santiago de chile: Iberoamérica.
 UPC (Universidad Peruana de Ciencias Aplicadas) (2008). Alimentos, Bromatología.
Capitulo: Aceites y Grasas, Lima-Perú.
 F. Osear, C. González, M. Prieto, J Bada y R. Alonso (1999) Estudio de la
densidad y de la viscosidad de algunos ácidos grasos puros

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Analiz 555555

  • 1. UNIVERSIDAD NACIONAL INTERCULTURAL DE LA AMAZONIA FACULTAD DE INGENIERIA Y CIENCIAS AMBIENTALES CARRERA PROFESIONAL DE INGENIERIA AGROINDUSTRIAL IMFROME Nº 03: DETERMINACION DE LA DENSIDAD DOCENTE : Ing. Ing. Iris Ruiz Yance.. ASIGNATURA : Análisis de Producto Agroindustrial.. ESTUDIANTES : Froy Flauber Ynga Canaico. CICLO : VI F. ENTREGA : 14/11/18. YARINACOCHA - PERÚ
  • 2. 2018 I. RESULTADO. 1.1. Tabla de los cálculos de la densidad del jugo de papaya, la leche y el aceite. MUESTRA R WPV WPH20 WP muestra Densímetro Densidad Relativa Densidad Absoluta JUGO DE PAPAYA R1 88 gr 138 gr 139 gr 1038 1,02 9,99 R2 88 gr 139 gr 1110 1,02 9,99 R3 88 gr 139 gr 1132 1,02 9,99 LECHE R1 90 gr 140 gr 141 gr 1,02 9,99 R2 90 gr 141 gr 1,02 9,99 R3 90 gr 140 gr 1 9,8 ACEITE R1 89 gr 137 gr 133 gr 0,92 9,02 R2 89 gr 133 gr 0,92 9,02 R3 89 gr 133 gr 0,92 9,02 CALCULOS DE LA DENSIDAD RELATIVA Y ABSOLUTA. 1.1. Relativa. DRelativa = 𝐏𝐄𝐒𝐎𝐦𝐮𝐞𝐬𝐭𝐫𝐚−𝐏𝐄𝐒𝐎𝐩𝐯 𝐏𝐄𝐒𝐎𝐇𝟐𝐎−𝐏𝐄𝐒𝐎𝐩𝐯  Jugo de papaya m1. DRelativa = 𝟏𝟑𝟗−𝟖𝟖 𝟏𝟑𝟖−𝟖𝟖 = 1,02  Jugo de papaya m2. DRelativa = 𝟏𝟑𝟗−𝟖𝟖 𝟏𝟑𝟖−𝟖𝟖 = 1,02  Jugo de papaya m3. DRelativa = 𝟏𝟑𝟗−𝟖𝟖 𝟏𝟑𝟖−𝟖𝟖 = 1,02  Leche m1. DRelativa = 𝟏𝟒𝟏−𝟗𝟎 𝟏𝟒𝟎−𝟗𝟎 = 1,02  Leche m2. DRelativa = 𝟏𝟒𝟏−𝟗𝟎 𝟏𝟒𝟎−𝟗𝟎 = 1,02  Leche m3. DRelativa = 𝟏𝟒𝟎−𝟗𝟎 𝟏𝟒𝟎−𝟗𝟎 = 1  Aceite m1. DRelativa = 𝟏𝟑𝟑−𝟖𝟗 𝟏𝟑𝟕−𝟖𝟗 = 0,92
  • 3.  Aceite m2. DRelativa = 𝟏𝟑𝟑−𝟖𝟗 𝟏𝟑𝟕−𝟖𝟗 = 0,92  Aceite m3. DRelativa = 𝟏𝟑𝟑−𝟖𝟗 𝟏𝟑𝟕−𝟖𝟗 = 0,92 1.3. Absoluta. Se multiplica el resultado de la densidad relativa por (9.8) y (1gr/𝑚3 ).  Jugo de papaya m1. DAbsoluta = 1,02 x 9,8 x (1gr/𝑚3 ) = 9,99  Jugo de papaya m2. DAbsoluta = 1,02 x 9,8 x (1gr/𝑚3 ) = 9,99  Jugo de papaya m3. DAbsoluta = 1,02 x 9,8 x (1gr/𝑚3 ) = 9,99  Leche m1. DAbsoluta = 1,02 x 9,8 x (1gr/𝑚3 ) = 9,99  Leche m2. DAbsoluta = 1,02 x 9,8 x (1gr/𝑚3 ) = 9,99  Leche m3. DAbsoluta = 1 x 9,8 x (1gr/𝑚3 ) = 9,8  Aceite m1. DAbsoluta = 0,92 x 9,8 x (1gr/𝑚3 ) = 9,02  Aceite m2. DAbsoluta = 0,92 x 9,8 x (1gr/𝑚3 ) = 9,02  Aceite m3. DAbsoluta = 0,92 x 9,8 x (1gr/𝑚3 ) = 9,02 II. DISCUSION.  En la práctica realizada el valor obtenido sobre la densidad de la leche fue de 1.02 a 1 pero el valor establecido para la leche por la NORMA NTE INEN 009:2012 establece un rango entre 1.028 – 1.032 por lo que vemos en la primer y segunda muestra que nuestro valor está muy cerca de lo permitido, pero en la muestra tres no se encuentra en el rango esto se debe probablemente fue añadido alguna sustancia como agua o suero.  la densidad de la leche entera depende de las fracciones de grasa sólida y líquida que estén presentes, lo cual está determinado tanto por la temperatura de trabajo, como por la historia térmica de la muestra (McCarthy et al., 2009)  El CODEX nos da unos intervalos de densidad para cada tipo de aceite con el fin de poder identificarlo y verificar su buen estado. En la práctica de laboratorio se determinaron la densidad de un tipo de aceite pero en diferentes muestras: aceite vegetal de soya.  Bernal de Ramírez, I. (1993). menciona que la densidad del aceite cambia con la temperatura; conforme aumenta la temperatura, el aceite se dilata, y por tanto su densidad disminuye; por ello en un estudio es necesario expresar la densidad del aceite en relación a la temperatura.
  • 4.  Bernardini. E. (1991). manifiesta que para mediciones exactas no es recomendable emplear picnómetros con volúmenes mayores a 30 ml. III.COMCLUSION.  Se ha establecido la densidad de la leche y obtuvimos 1.02 y 1 g/cm3 a 28 °C con la densidad de la norma NORMA NTE INEN 009:2012 que es mínimo 1.028 y máximo 1.032 esto a una temperatura de 20 ° C, podemos decir que la leche analizada está dentro del rango permitido, por lo cual es posible que esta leche no ha sido adulterada.  El método del picnómetro es un método muy utilizado para la determinación de la densidad, debido a que si es utilizado correctamente da valores muy precisos.  Las densidades halladas para las muestras de aceite de soya fue 0.92 respectivamente, los cuales están dentro de los intervalos bibliográficos; este resultado nos indica que el aceite analizado estaba en buen estado. IV. BIBLIOGRAFIA.  Ciro, A. (1993). Manual de manejo y análisis alimentario postcosecha de granos a nivel rural. Oficina Regional de la FAO América latina y el Caribe. Santiago de chile: Iberoamérica.  UPC (Universidad Peruana de Ciencias Aplicadas) (2008). Alimentos, Bromatología. Capitulo: Aceites y Grasas, Lima-Perú.  F. Osear, C. González, M. Prieto, J Bada y R. Alonso (1999) Estudio de la densidad y de la viscosidad de algunos ácidos grasos puros