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ANACHEM m3

ANACHEM m3

21問 • 11ヶ月前

問題一覧

1

A chemical analysis is meaningless unless you begin with a meaningful sample.

sample preparation

2

is the process of collecting a representative sample for analysis.

sampling

3

The process of selecting a portion of the material, in some manner, to represent or provide information about a larger body of material.

sampling

4

Generally require some degree of sample preparation to remove substances that interfere with the analysis of the desired analyte

real samples

5

Bulk sample also called a _____ _____is taken from the lot for analysis or archiving (storing for future reference).

gross sample

6

Types of Sampling: Sample is collected randomly from the target population. Increments are taken in such a way that any portion of the bulk has the same probability of being sampled out. Bias is reduced to a minimum if not eliminated

random

7

Available information about the target population is used to help select samples Sample are taken according to a sampling plan to screen out materials with certain characteristics and/or select materials with other relevant characteristics. More biased, but fewer samples are required Used when the number of independent variables influencing the results of an analysis are to be limited

selective

8

Types of Sampling The target population is sampled at regular intervals in space or time (Systematic sample) Increments are taken at predetermined intervals as defined by the sampling plan Intermediate bias with respect to random and selective sampling.

systematic

9

Sample Preparation Target populations are conveniently subdivided into distinct units , in each of which random sampling is done. Advantage: the composition of each stratum is often more homogeneous than that of the entire target population, leading to lower sampling variance (uncertainty).

stratified

10

One lot of lotion in the finished goods section (1000 bottles)

Simple random sampling

11

Polymer film manufactured by a chemical company

Systematic sampling

12

Patient suspected of chronic poisoning

Selective sampling

13

Soil in your hacienda

Stratified sampling

14

SAMPLING OPERATIONS A single sample taken from the target bulk.

Grab sampling

15

SAMPLING OPERATIONS Several grab samples combined to form a single sample

Composite sampling

16

SAMPLING OPERATIONS Sampling done within the population without physically removing the sample

In-situ sampling

17

Canned sardines coming out through a conveyor belt

Composite sampling

18

Analysis of lunar soil in lunar environment

In-situ sampling

19

Soil in your hacienda

Grab sampling

20

______is a notorious ion exchanger that alters the concentrations of trace ions in solution.

glass

21

Therefore,plastic (especially ______) collection bottles are frequently employed.

teflon

biochem

biochem

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biochem

biochem

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inorg

inorg

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inorg

inorg

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phychem

phychem

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phychem

phychem

99問 • 1年前

GREAT BOOKS

GREAT BOOKS

velante · 56問 · 11ヶ月前

GREAT BOOKS

GREAT BOOKS

56問 • 11ヶ月前

BIOCHEMZ (bioenergetics)

BIOCHEMZ (bioenergetics)

velante · 12問 · 11ヶ月前

BIOCHEMZ (bioenergetics)

BIOCHEMZ (bioenergetics)

12問 • 11ヶ月前

BIOCHEMZ (cellular respi.)

BIOCHEMZ (cellular respi.)

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BIOCHEMZ (cellular respi.)

BIOCHEMZ (cellular respi.)

28問 • 11ヶ月前

BIOCHEMZ(glycolysis)

BIOCHEMZ(glycolysis)

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BIOCHEMZ(glycolysis)

BIOCHEMZ(glycolysis)

28問 • 11ヶ月前

BIOCHEMZ(fates of pyruv)

BIOCHEMZ(fates of pyruv)

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BIOCHEMZ(fates of pyruv)

BIOCHEMZ(fates of pyruv)

33問 • 11ヶ月前

BIOCHEMZ(krebs)

BIOCHEMZ(krebs)

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BIOCHEMZ(krebs)

BIOCHEMZ(krebs)

32問 • 11ヶ月前

BIOCHEMZ(ETC)

BIOCHEMZ(ETC)

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BIOCHEMZ(ETC)

BIOCHEMZ(ETC)

47問 • 11ヶ月前

PHYCHEM

PHYCHEM

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PHYCHEM

PHYCHEM

54問 • 11ヶ月前

PHYCHEM 2

PHYCHEM 2

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PHYCHEM 2

PHYCHEM 2

57問 • 11ヶ月前

FOOD CHEM food quali

FOOD CHEM food quali

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FOOD CHEM food quali

FOOD CHEM food quali

60問 • 11ヶ月前

FOOD CHEM water charact

FOOD CHEM water charact

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FOOD CHEM water charact

FOOD CHEM water charact

61問 • 11ヶ月前

FOOD CHEM starch

FOOD CHEM starch

velante · 46問 · 11ヶ月前

FOOD CHEM starch

FOOD CHEM starch

46問 • 11ヶ月前

FOOD CHEM starch 2

FOOD CHEM starch 2

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FOOD CHEM starch 2

FOOD CHEM starch 2

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FOOD CHEM pectins

FOOD CHEM pectins

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FOOD CHEM pectins

FOOD CHEM pectins

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ANACHEM m1

ANACHEM m1

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ANACHEM m1

ANACHEM m1

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ANACHEM m2

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ANACHEM m2

ANACHEM m2

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branches of ethics

branches of ethics

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branches of ethics

branches of ethics

8問 • 10ヶ月前

branches of philosophy

branches of philosophy

velante · 13問 · 10ヶ月前

branches of philosophy

branches of philosophy

13問 • 10ヶ月前

morality

morality

velante · 33問 · 10ヶ月前

morality

morality

33問 • 10ヶ月前

greeks

greeks

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greeks

greeks

13問 • 10ヶ月前

chap 20

chap 20

velante · 10問 · 9ヶ月前

chap 20

chap 20

10問 • 9ヶ月前

chapt 21A

chapt 21A

velante · 10問 · 9ヶ月前

chapt 21A

chapt 21A

10問 • 9ヶ月前

chapt 21B

chapt 21B

velante · 10問 · 9ヶ月前

chapt 21B

chapt 21B

10問 • 9ヶ月前

chapt 22

chapt 22

velante · 10問 · 9ヶ月前

chapt 22

chapt 22

10問 • 9ヶ月前

chapt 23A

chapt 23A

velante · 10問 · 9ヶ月前

chapt 23A

chapt 23A

10問 • 9ヶ月前

chapt 23B

chapt 23B

velante · 10問 · 9ヶ月前

chapt 23B

chapt 23B

10問 • 9ヶ月前

chapt 24

chapt 24

velante · 10問 · 9ヶ月前

chapt 24

chapt 24

10問 • 9ヶ月前

identi

identi

velante · 10問 · 9ヶ月前

identi

identi

10問 • 9ヶ月前

application

application

velante · 5問 · 9ヶ月前

application

application

5問 • 9ヶ月前

matching

matching

velante · 10問 · 9ヶ月前

matching

matching

10問 • 9ヶ月前

multiple choices

multiple choices

velante · 20問 · 9ヶ月前

multiple choices

multiple choices

20問 • 9ヶ月前

問題一覧

1

A chemical analysis is meaningless unless you begin with a meaningful sample.

sample preparation

2

is the process of collecting a representative sample for analysis.

sampling

3

The process of selecting a portion of the material, in some manner, to represent or provide information about a larger body of material.

sampling

4

Generally require some degree of sample preparation to remove substances that interfere with the analysis of the desired analyte

real samples

5

Bulk sample also called a _____ _____is taken from the lot for analysis or archiving (storing for future reference).

gross sample

6

Types of Sampling: Sample is collected randomly from the target population. Increments are taken in such a way that any portion of the bulk has the same probability of being sampled out. Bias is reduced to a minimum if not eliminated

random

7

Available information about the target population is used to help select samples Sample are taken according to a sampling plan to screen out materials with certain characteristics and/or select materials with other relevant characteristics. More biased, but fewer samples are required Used when the number of independent variables influencing the results of an analysis are to be limited

selective

8

Types of Sampling The target population is sampled at regular intervals in space or time (Systematic sample) Increments are taken at predetermined intervals as defined by the sampling plan Intermediate bias with respect to random and selective sampling.

systematic

9

Sample Preparation Target populations are conveniently subdivided into distinct units , in each of which random sampling is done. Advantage: the composition of each stratum is often more homogeneous than that of the entire target population, leading to lower sampling variance (uncertainty).

stratified

10

One lot of lotion in the finished goods section (1000 bottles)

Simple random sampling

11

Polymer film manufactured by a chemical company

Systematic sampling

12

Patient suspected of chronic poisoning

Selective sampling

13

Soil in your hacienda

Stratified sampling

14

SAMPLING OPERATIONS A single sample taken from the target bulk.

Grab sampling

15

SAMPLING OPERATIONS Several grab samples combined to form a single sample

Composite sampling

16

SAMPLING OPERATIONS Sampling done within the population without physically removing the sample

In-situ sampling

17

Canned sardines coming out through a conveyor belt

Composite sampling

18

Analysis of lunar soil in lunar environment

In-situ sampling

19

Soil in your hacienda

Grab sampling

20

______is a notorious ion exchanger that alters the concentrations of trace ions in solution.

glass

21

Therefore,plastic (especially ______) collection bottles are frequently employed.

teflon