96:
with a little water and titrated with alcoholic potassium hydroxide (if sample is acidic). A glass electrode and reference electrode is immersed in the sample and connected to a voltmeter/potentiometer. The meter reading (in millivolts) is plotted against the volume of titrant. The end point is taken
115:
Spectroscopic methods: as with many chemical parameters, spectroscopy can be used to make fast, accurate measurements once calibrated by a reference method. Mid and near infrared spectroscopy are most commonly used for this purpose. Spectroscopic methods are valuable as they can also be used to
224:
Sjöblom, J.; Aske, N.; Harald Auflem, I.; Brandal, Ø.; Erik Havre, T.; Sæther, Ø.; Westvik, A.; Eng
Johnsen, E.; Kallevik, H. (2003). "Our current understanding of water-in-crude oil emulsions".
112:, is used. Titrant is added to the sample by means of a burette. The volume of titrant used to cause a permanent color change in the sample is recorded and used to calculate the TAN value.
175:
Jingyan, L.; Xiaoli, C.; Songbai, T. (2012). "Research on
Determination of Total Acid Number of Petroleum Using Mid-infrared Attenuated Total Reflection Spectroscopy".
81:
TAN values may also be useful in other industries where oils are used as lubricants to determine oxidation and the subsequent corrosion risk to machinery.
274:
248:
55:
in milligrams that is needed to neutralize the acids in one gram of oil. It is an important quality measurement of
75:
28:
279:
52:
202:
256:– O'Leary describes the theory and practice of measuring Total acid number on-line in beverages.
130:
229:
184:
109:
98:
71:
74:
in the crude oil that cause corrosion problems. This type of corrosion is referred to as
233:
268:
117:
63:
116:
simultaneously measure a number of other parameters and do away with the need for
17:
35:
153:
67:
56:
93:
89:
188:
51:) is a measurement of acidity that is determined by the amount of
88:
Potentiometric titration: The sample is normally dissolved in
105:
249:"Testing Brix and Acid In-Line for the Beverage Industry"
84:
TAN value can be deduced by various methods, including
148:
146:
8:
97:at the distinct inflection of the resulting
104:Color indicating titration: An appropriate
101:corresponding to the basic buffer solution.
226:Advances in Colloid and Interface Science
203:"Petroleum Characteristics and Analysis"
142:
62:The TAN value indicates to the crude
7:
25:
40:Quality measurement of crude oil
1:
247:Robert O'Leary BevSense LLC.
234:10.1016/S0001-8686(02)00066-0
154:"Lab Services > TAN test"
70:problems. It is usually the
296:
33:
26:
76:naphthenic acid corrosion
108:color indicator e.g.
275:Analytical chemistry
228:. 100–102: 399–473.
27:For other uses, see
53:potassium hydroxide
177:Energy & Fuels
189:10.1021/ef3002372
156:. CPI Engineering
131:Total base number
66:the potential of
45:total acid number
18:Total Acid Number
16:(Redirected from
287:
255:
253:
239:
237:
221:
215:
214:
212:
210:
199:
193:
192:
172:
166:
165:
163:
161:
150:
72:naphthenic acids
21:
295:
294:
290:
289:
288:
286:
285:
284:
265:
264:
263:
251:
246:
243:
242:
223:
222:
218:
208:
206:
201:
200:
196:
174:
173:
169:
159:
157:
152:
151:
144:
139:
127:
110:phenolphthalein
99:titration curve
41:
38:
32:
23:
22:
15:
12:
11:
5:
293:
291:
283:
282:
277:
267:
266:
262:
261:External links
259:
258:
257:
241:
240:
216:
194:
167:
141:
140:
138:
135:
134:
133:
126:
123:
122:
121:
113:
102:
39:
24:
14:
13:
10:
9:
6:
4:
3:
2:
292:
281:
278:
276:
273:
272:
270:
260:
250:
245:
244:
235:
231:
227:
220:
217:
204:
198:
195:
190:
186:
182:
178:
171:
168:
155:
149:
147:
143:
136:
132:
129:
128:
124:
119:
118:wet chemistry
114:
111:
107:
103:
100:
95:
91:
87:
86:
85:
82:
79:
77:
73:
69:
65:
60:
58:
54:
50:
46:
37:
30:
19:
225:
219:
207:. Retrieved
197:
180:
176:
170:
158:. Retrieved
83:
80:
64:oil refinery
61:
48:
44:
42:
183:(9): 5633.
280:Motor oils
269:Categories
137:References
36:Acid value
34:See also:
68:corrosion
57:crude oil
125:See also
94:propanol
90:toluene
78:(NAC).
238:p. 404
209:2 June
205:. ASDI
160:2 June
252:(PDF)
211:2014
162:2014
92:and
43:The
230:doi
185:doi
49:TAN
29:Tan
271::
181:26
179:.
145:^
106:pH
59:.
254:.
236:.
232::
213:.
191:.
187::
164:.
120:.
47:(
31:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.