UNIVERSIDAD NACIONAL MAYOR MAYOR DE SAN MARCOS M ARCOS (Univ!"i#$# #% P!&' D$n$ # A)*!i$+
FACULTA FACULTAD DE D E FARMACIA Y BIO,UÍMIC BIO ,UÍMICA A ESCUELA ACAD-MICA PROFESIONAL DE FARMACIA Y BIO,UÍMICA
AÑO ACADEMICO: 2016-I. SEMESTRE ACADEMICO: NOVENO CICLO. DEPARTAMENTO ACADEMICO: TOXICOLOGIA Y QUÍMICA LEGAL. NOMBRE DEL CURSO: TOXICOLOGÍA Y QUÍMICA LEGAL. TÍTULO DE LA L A PRÁCTICA Y NÚMERO DE LA L A PRÁCTICA: PRÁCTICA: ENSAYOS DE ANÁLISIS ANÁLISIS QUÍMICO TOXICOLÓGICOS TOXICOLÓGICOS.. PRÁCTICA 2.
GRUPO: JUEVES DE 10-2 PM. INTEGRANTES:
ABAD MALDONADO MALDONADO VIDAL VIDAL 120!00!" 120!00!" CARREAL GOME# CARLOS ALBERTO 120!0101 CASO LOMBARDI JOS$ CARLOS 100!00%2 GUERRA CABALLERO RIC&ARD 'EVIN 120!006" NAVARRO NAVARRO SOTO ARNALDO JOSEP& JOSEP& 120!011 1 20!011( (
NOMBRE DEL PROFESOR DE PRÁCTICA: PRÁCTICA: JOSE AL)ONSO APESTEGUIA IN)ANTES.
FECHA DE LA PRÁCTICA REALIZADA: JUEVES *1 DE MAR#O. TURNO: 10-2 PM.
INTRODUCCIÓN TEÓRICA
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Intoxicacion Intoxicacion por Cianuro: La enzi enzima ma rodan rodanas asa: a: co conv nver ersi sión ón del del 80% 80% del del cian cianur uro o (CN) (CN) a tioci iocian anat ato o en pre prese senc ncia ia de tiosu iosulf lfat ato o Util Utiliiza cuat cuatrro vas meta!ólicas diferentes: "I#$&N'#&CI*N "I#$&N'#&CI*N 'e meta!oliza en el +,ado $#-IC#CIN.$IC& $#-IC#CIN.$IC& /L CI&NU# CN 1 $iosulfato odanasa $iocianato 1 'ul2to l mecanismo de acción del cianuro: orma comple3os esta!les con iones met4licos5 teniendo una ,ran a2ni a2nida dad d por por el +ier +ierrro f6r f6rrico rico (fe1 (fe111 11)7 )7 l cian cianur uro o in+i in+i!e !e la transformación del piruvato en el ciclo de re!!s5 resultando en +iperproducción de lactato 9 acidosis meta!ólica severa7 &l cianuro se le encuentra en forma natural como componente or,4n or,4nic ico o en al,u al,una nass plan planta tass o se semi mill llas as de frut frutas as ,lu ,lucó cósi sido doss cian ciano, o,6n 6nic icos os 9 tam! tam!i6 i6n n es produ produci cido do por por cier cierta tass !act !acter eria ias5 s5 +on,os 9 al,as7 ;or lo dem4s5 en microcantidades el cianuro es un compuesto indispensa!le en la dieta +umana7 'u acción !ioló,ica lo caracteriza como un in+i!idor enzim4tico no espec2ca5 !lo
PARTE EXPERIMENTAL - Objetivos /eterminar si la muestra pro!lema (orina ) contiene cianuro7 /eterminar si la muestra de orina restos de acido su>+idrico
- Materiales "ea?er de @A0 mL $iras de papel 2ltro 2ltro eactivos: ' 7 de 'c+om!ein 5 '7 de Iodo &lmidonado5 '7 de Bri,nard 5'7 de &,N0 5 '7 ;dCl@5 '7 de $artaro em6tico7 '7 de&cetato de ;!7 '7 &lcalino7 - Equipos "a=o ara
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!! No1br No1bre e 2e la Rea3 Rea33i4 3i456 56 ;apel ,ua9acocKprico o de 'c+om!ein7 s un ensa9o sensi!le pero inespec2co7 'e puede reconocer +asta 07@A, de 4cido cian+drico
!)!! 7u52 !) 7u52a1e a1e5to 5to66 l ensa9o se fundamenta en el aumento del potencial de oxidación de las sales cKpricas al pasar a sales cuprosas insolu!les o poco disociadas7 l ensa9o es identi2cativo dado
!.! T835i 835i3a 3a oper operator atoria6 ia6 n el momento de su uso5 se em!e!e una fran3a de papel de 2ltro en una solución de Cu'#G al D0 % de3ando escurrir el exceso7 Lue,o se em!e em !e!e !e en una una so solu lucción ión resina sina de ,ua9 ,ua9ac aco o al D0% de rec eciiente ente preparación7 l reactivo del papel de ,ua9aco puesto en la !oca del recipiente con la muestra 9 se lleva a !a=o mara por A minutos7 Lue,o el papel se colorea de azul de!ido a la oxidación la resina7
!*! ! *!
Me3a Me 3a5i 5is1 s1o o 2e 2e rea rea33 33i4 i456 56 DECND 1DEF1 DEFCN 1 8Cu11 8(CN)@Cu
GC@N@1C@@F@E#E1F@# GCu@(CN)@ 1 GFCN %CN- & 'Cu&& & ($)O & C))$)%O% C))$)%O%
D@FCN 8Cu(CN)@ 1 DEF1 GCu@(CN)@ 1 GC@N@ GF#NC1 GFCN1C@@F@G#H18F1 GCu@(CN)J 1 GF1 *$ONC& +Cu),CN./- & )$- & C))$)*O0
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A3! !%!
A
Resulta2os6
n la parte experimental se o!servó la formación del azul de ,ua9aco por lo
)! PAPEL "EN"I "EN"I#LE #LE ;ODO ;ODO ALMIDONADO ALMIDONA DO )!! No1br No1bre e 2e la rea3 rea33i4 3i45 5 ;apel 9odoalmidonado7 $iene una sensi!ilidad de D,7 s un ensa9o mu9 sensi!le pero inespec2co
)!)!! 7u52 )!) 7u52a1e a1e5to 5to66 l ioduro de potasio forma el anión tri9oduro (IM) al com!inarse con iodo iodo ele eleme menta ntal7 l7 & difer diferenc encia ia del iodo5 iodo5 los tri9od tri9oduro uross son altame altamente nte solu!les en a,ua5 por lo
T835i3a operatoria6
n el momento de su uso5 se em!e!e una fran3a de papel de 2ltro con una ,ota de solución de almidón de3ando escurrir el exceso7 Lue,o se em!e!e con una ,ota de solución acuosa de 9odo9odurado7
)!*! Me3a Me3a5is 5is1o 1o 2e rea3 rea33i45 3i4566
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)!9! Rea33i45 ,e3ua3i45 qu:1i3a bala53ea2a bala53ea2a66 FCN 1 I@
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)!%!! Res )!% Resul ulta2 ta2os6 os6 7 n la parte experimental se o!servó
.! PAPEL "EN"I#LE DE ?RI?NARD .!! No1br No1bre e 2e la rea3 rea33i4 3i45 5 nsa9o de Bri,nard5 reacción poco sensi!le
.!)!! 7u52 .!) 7u52a1e a1e5to 5to66 l ensa9o se fundamenta en
.!.! T835i 835i3a 3a oper operator atoria6 ia6 n el extremo de una tira de papel de 2ltro a,re,ar D@ ,otas de solución solución de Na#F D0% 9 adicionar adicionar @ ,otas del reactivo reactivo de 4cido pcrico pcrico D%7 n el otro extre extremo mo colocar colocar el nKmero 7 Colocarlo Colocarlo al !orde de un
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m, de 4c 4cid ido o tart tart4r 4ric ico o7 $ermi ermina nado do el !a=o !a=o de ar ara5 a5 o!se o!serv rvar ar los los resultados en un vidrio limpio7 ./0/
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R"5%8$#1": n la part arte experimental se o!servó la formac aciión de
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0/ PA PAPEL PEL SENSIBLE DE NITRATO DE PLATA (AGNO.+ 0/9/
N1)! # %$ !$i2n
;oco sensi!le de!ido a la poca cantidad de reactivo para reaccionar7 reaccionar7
0/;/
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eacciona con la muestra pro!lema formando 4cido sulf+drico (en forma de sulfuro ar,6ntico) adem4s de arsina 9 fósforo !lanco7 0/./
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n el extremo de una tira de papel de 2ltro5 a,re,ar I o II ,otas de solución de nitrato de plata D0%7 n el otro extremo extremo colocar el nKmero G7 #!tenida la tira reactiva (papel sensi!le) colocarlo al !orde de un frasco !oca anc+a5
M$ni")1 # !$i2n:
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$/
7os1a1i5a6 formación de fosfuro de plata F; 1 &,1
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Arse5a1i5a6 separación de plata met4lica
F&s 1 E&,1 1 @ F@#
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F&s#@ 1 EF1 1 E&,#
Estiba1i5a6 formación de antimoniuro de plata7 F'! 1 &,#
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74soro bl bla53o6 ;G 1 E F@# F F; 1 &,1
D@ D@&,1 1 F;#@ 1 EF@#
F; 1 F;#@ &,; 1 EF1
F;#G 1 DAF1 1 D@&,#
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9!.! T835i 835i3a 3a oper operator atoria6 ia6 'e colocar la cuarta parte de la muestra en frasco de !oca anc+a con un extrem extremo o de una tira de D0 cm7 cm7 ;o ;orr D cm7 de papel O+atman O+atman NP D una ,ota de solución solución de clorur cloruro o de paladio paladio77
Lue,o Lue,o se colocar colocar DQ DQ de la la tira
por el extremo
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%! PAPEL "EN"I#LE DE TRT TRTARO EMTICO EMTI CO E7D Nom!re de la reacción: ;apel 'ensi!le de $4rtaro m6tico (D0%) o tartrato de antimonio 9 potasio7
E7@ undamento: l t4rtaro em6tico (tartrato de antimonio 9 potasio) al entrar en contacto con el 4cido sulf+drico precipita en forma de sulfuro de antimonio7
E7 $6cnica operatoria: Colocar la cuarta parte de la muestra en un frasco de vidrio de !oca anc+a5 lue,o colocar en un extremo extremo una tira de D0 cm - D cm de papel O+atman NP D una ,ota de solución de t4rtaro em6tico7 Colocar Colocar DQ de de la tira tira por el extremo extremo
E7G ecanismo de reacción: ('!#)CGFG#E 1 F@'
eacción eacción de do!le do !le sustitución
'!@' 1 F(CGFG#E) 1 F@#
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E7A eacción !alanceada: @('!#)C GFG#E 1 F@'
'!@' 1 @F(CGFG#E) 1 @F@#
E7E esultados: 'e evidenció la formación de una coloración naran3a dando positiva la presencia de F@'
(! PAPEL "EN"I#LE DE ACETATO ACETATO DE PLOMO R7D Nom!re de la reacción: ;apel sensi!le de acetato de plomo 'ensi!ilidad: D u, de azufre
R7@ undamento: &l expon exponers erse e el olo olorr de una muest muestra ra acidi2 acidi2cad cada a li,era li,eramen mente5 te5 el papel papel se enne,rece por formación de ;!'7
R7 $6cnica operatoria: 'e impre,na una tira de papel con una solución al D0% de acetato de plomo 9 se expone al interior del recipiente por unos minutos7 'e formar4 unos puntos ne,ros evidenciando la presencia de sulfuro de plomo7
R7G ecanismo de reacción:
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'! PAPEL "EN"I#LE ALCALINO 87D Nom!re de la reacción: nsa9o de a,nin 'ensi!ilidad: eacción poco sensi!le (D0 , de ión cianuro) pero mu9 espec2ca
87@ undamento: ealizado para el reconocimiento ealizado reconocimiento de pe
87 $6cnica operatoria:
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87G ecanismo de reacción: E FCN 1 E#F ECN 1 e11
ECN 1 EF@#
e (CN)EJNaG
G e e11 1 8#F
Ge (#F)@
'imult4neamente5 el ion ferroso se oxida a f6rrico de!ido a la ,ran super2cie de contacto con el aire: Ge (#F)@ 1 #@ 1 F@#
Ge (#F)
ue5 en medio acido reacciona con el anión ferrocianó,eno para dar el azul de ;rusia o ferrocianuro f6rrico7 e (CN)EJG 1 Ge (#F) 1 D@F1
87A eacción !alanceada:
D@F@# 1 e (CN)EJeG
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RE"ULTADO"
Fig 1. Cámara donde se colocan las tiras con los respectivos reactivos.
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DI"CU"IONE" •
n los los resul sultado tadoss de los los ensa9 nsa9o os de pape papelles se sens nsii!les !les se dete deterrminó minó co como mo posi positi tivo vo la rea eacc cció ión n del del pape papell se sens nsi! i!le le de 'c+on!ein5 el cual ante la presencia de FCN vira a un color azulS sin em!ar,o5 a pesar de ser sensi!le se le considera un m6todo ines inespe pec c2c 2co o (rea (reacc ccio iona na co con n todo todoss los los a,en a,ente tess oxida xidant ntes es55 en especial con Cl5 "r 9 ozono)7 sto5 sumado a la reacción positiva del papel sensi!le de Bri,nard nos corro!ora la presencia de FCN en la muestra !ioló,ica analizada7 ste compuesto es mu9 usado en la re2ne e2ner ra a de mine minera rale les5 s5 snt sntei eiss de pol polme merros 9 en los los pla,uicidas
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•
contr controla olarr el proce proceso so para para evitar evitar p6rdid p6rdidas) as)55 lue,o lue,o se deter determin mina a cualitativamente por medio de las reacciones coloreadas de azul de ;rusia o tiocianato f6rrico (coloración ro3iza caracterstica)7 n la actualidad se utilizan m6todos m4s modernos 9 r4pidos para la detección de FCN en muestras !ioló,icas5 tales como espect espectrof rofoto otome metr tra5 a5 potenc potenciom iometr etra5 a5 croma cromato, to,raf rafa a de ,ases5 ,ases5 electroforesis electroforesis capilar5 etc7 Loss resul Lo resultado tadoss positi positivos vos prue!a prue!ass de papel papel sensi! sensi!le le de t4rtar t4rtaro o em6tico 9 de acetato de ;! nos corro!ora la presencia de F@' en la mues muestr tra7 a7 l +idr +idró, ó,en eno o sulfu sulfurad rado o es un tóxi tóxico co sulf sulfur urado ado de la respiración celular5
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Indicador !ioló,ico de exposición: Co!alto urinario (C#u) (C# u) 7uestreo: Una muestra de orina al 2nal de la 3ornada de tra!a3o (@0 l) Indicador !ioló,ico: ercurio urinario ( FBU)5 uestreo: Colecta en la ma=ana7 Vl m6todo analtico para estas muestras es por espectofotometria por a!sorción atómica7
B A?ENTE" FUGMICO" FUE PRODUHCAN CANCER 7 los los parab arabe5 e5os os (los (los m4s co comu mune ness so son n el metilp tilpar ara! a!e eno5 no5 el
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9! I5 I5se se3t 3ti3 i3i2 i2as as o rati rati3i 3i2a 2as! s! Contie Contiene ne talio5 talio5 cianur cianuro5 o5 car!on car!onato atos5 s5 or,ano or,anofosf fosfora orado5 do5 estric estricnin nina5 a5
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)! Ra2ia3io5es 5o io5ios UK i51u5ol4=i3a transformación de las c6lulas normales en
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